Explore 213 evidence-backed veterinary conditions organized across 5 biological systems. Review clinical signs, differential diagnoses, immediate stabilization protocols, and avian veterinary care thresholds.
Infections, mycoplasma, and environmental irritants affecting breathing, sinuses, lungs, and air sacs.
Key Signs: Change in vocalization or voice, Reduced or crowing changes in roosters, Clicking sounds, Coughing
Key Signs: Increased respiratory effort, Open-mouth breathing, Exercise intolerance, Cyanosis
Key Signs: Depression, Coughing, Difficulty breathing, Open-mouthed breathing
Key Signs: Crusty eyes, Swollen eyelids, Rubbing heads against wings, Gray cloudy-looking cornea
Key Signs: Depression, Loss or change in voice pitch, Reduced crowing, Difficulty breathing
Key Signs: Greenish diarrhea, Ruffled feathers, Lethargy, Sneezing
Key Signs: Enlarged masses along the neck, Depression, Lethargy, Easily develop infections
Key Signs: Ruffled feathers, Facial swelling, Sneezing, Red or watery eyes
Key Signs: Coughing, Nasal/eye discharge, Tracheal rales, Reduced appetite
Key Signs: Shortness of breath (may be intermittent), Difficulty breathing, Coughing, Wheezing
Key Signs: Eye discharge, Conjunctivitis, Gurgling sounds, Gaping
Key Signs: Reddened, inflammed conjunctiva, Eye discharge, Matting of feathers underneath eye(s), Crusting over eyelid
Key Signs: Sneezing, Nasal and ocular discharge, Swollen sinuses, Difficulty breathing
Key Signs: Feather matting, Crusty discharge over ear opening, Frequent scratching or rubbing of head, Inflammation
Key Signs: Exercise intolerance, Weakness, Difficulty breathing, Cyanosis (darkened comb)
Key Signs: Respiratory distress, Head shaking, Scratching head with the feet, Difficulty swallowing
Key Signs: Lethargy, Fever, Reduced appetite, Ruffled feathers
Key Signs: Scab or wart-like lesions on comb, face and wattles, Yellow canker lesions inside mouth, Sneezing, Coughing
Key Signs: Gaping, Emitting a grunting sound, Difficulty breathing, Coughing
Key Signs: Weight loss, Chronic respiratory signs, Loss of appetite
Key Signs: Frothy exudate in the eyes, Rales, Sneezing, Coughing
Key Signs: Facial swelling, Nasal discharge, Conjunctivitis and ocular discharge, Depression/lethargy
Key Signs: Eye discharge, Nasal discharge, Sneezing, Gurgling sounds
Key Signs: Pigmented raised mass, Facial swelling, Increased respiratory effort, Difficulty swallowing
Key Signs: Head tremors, Head tilt, Twisted neck (torticollis), Incoordination
Key Signs: Nasal discharge, Sneezing, Facial swelling, Coughing
Key Signs: Coughing, Sneezing, Abnormal respiratory noises, Change or loss in voice
Key Signs: Lethargy, Reducing mating, Decreased appetite, Reduced fertility
Key Signs: Sneezing, Nasal or eye discharge, Facial or eye swelling, Sunken sinus (the appearance of a 'lost eye'
Key Signs: Facial swelling, Sneezing, Coughing, Conjunctivitis
Key Signs: Depression, Sneezing, coughing, and gasping for air, Nasal discharge, Greenish, watery diarrhea
Key Signs: Soft and distended abdomen, Wet or open navel, Unabsorbed, enlarged yolk sack, Discoloration of navel
Conditions impacting crop emptying, bacterial/fungal candidiasis, gizzard impaction, coccidiosis, and gut health.
Key Signs: Difficulty breathing, Lethargy, Loss of appetite, Weakness or inability to walk
Key Signs: Significantly shortened wing, Absence of tarsometatarsus
Key Signs: Weakness, Pale face, comb/wattles, Lethargy, Weight loss
Key Signs: Abdominal distension, Difficulty breathing, Cyanosis, Lethargy
Key Signs: Behavioral changes, Weight loss, Muscle wasting, Decreased appetite
Key Signs: Swelling, Warmth present, Lameness
Key Signs: Loss of appetite, Weakness, Diarrhea, Pale, shriveled comb
Key Signs: Diarrhea, Weight loss, Stunted growth, Gout
Key Signs: Conjunctival redness, Ocular discharge, Blepharospasm, Frequent scratching of eyes
Key Signs: Progressive weight loss, Low body condition score, Diarrhea and soiling of vent feathers (pasty butt), Poor feathering
Key Signs: Cracking in the beak, Bleeding, Partial or complete loss of the beak
Key Signs: Sulfur-yellow droppings, Increased drinking, Dull and ruffled feathers, Loss of appetite
Key Signs: Wry neck (transitory), Walking backwards, Incoordination/ataxia, Difficulty perching
Key Signs: Reddening and irritation in breast bone area
Key Signs: Broken blood feather with excessive bleeding
Key Signs: Hen sits in nest box for prolonged periods of time
Key Signs: White or yellow caseated plaques inside mouth, Difficulty swallowing, Regurgitation, Weight loss
Key Signs: Cloudy eye(s), Visible whiteness in pupil, Sensitivity to light, Loss of eyesight
Key Signs: Head flicking, Difficulty swallowing, Loss of appetite, Diarrhea
Key Signs: Listlessness, Unthriftiness, Depression
Key Signs: Paddling of legs, Incoordination/lack of balance, Diarrhea
Key Signs: Ruffled feathers, Depression, Pale comb and wattles, Diarrhea (watery) w/ mucous or blood
Key Signs: Weakness, Lethargy, Reduced appetite, Poor growth
Key Signs: Enlarged crop, Crop fails to empty, Reduced number of droppings, Smaller droppings then normal
Key Signs: Delayed or absent crop emptying, Enlarged or distended crop, Sour or foul odor from the mouth, Regurgitation or vomiting
Key Signs: Blackening of beaks, claws and feet, Decay of wattles, comb, and/or beak, Loss of coordination, Nervousness
Key Signs: Bird seen frequently scratching eye, Conjunctivitis, Eyelids stuck together, Blindness
Key Signs: Inability to open eye, Bleeding from eye area, Something embedded in the eye, Unusual pupil size or shape
Key Signs: White powdery comb and/or wattles, Thickened, crusty skin around head
Key Signs: Oval or elongated lump or mass growing from feather follicle
Key Signs: Black spots on comb and/or wattles, Bleeding, Isolation from other flock members
Key Signs: Foul odor, Skin wounds that enlarge, Depression, Lack of appetite
Key Signs: Sudden death, Loss of appetite, Ruffled feathers, Pale comb/wattles
Key Signs: Lameness, Reluctance to move or stand, Pain on palpation, Swelling
Key Signs: Weight loss, Mucoid diarrhea, Reduced appetite, Depression
Key Signs: Enlargement of the eye, Blindness
Key Signs: Dark red to purple, soft, nodular mass, Subcutaneous swelling, Ulceration and necrosis
Key Signs: Panting, Lethargy, Increased thirst, Reduced egg production
Key Signs: Bulge or lump, Abdominal swelling, Skin ulceration, Hemorrhage
Key Signs: Huddling together, Pale or bluish face and/or comb, Lying down, unable to stand, Change in heart rate
Key Signs: Yellowish diarrhea, Weight loss, Lethargy, Decreased appetite
Key Signs: Reduced appetite, Depression, Ruffled feathers, Vent pecking behavior
Key Signs: Weight loss, Reduced appetite, Pale face and comb (anemia), Abnormal droppings
Key Signs: Reluctance to move, Sitting alone, Ruffled feathers, Loss of appetite
Key Signs: Reluctance to move, Decreased activity, Muscle atrophy, Lameness
Key Signs: Subcutaneous mass, Ulceration of skin
Key Signs: Feather loss, New pin feathers, Extra sensitive to touch
Key Signs: Mucoid, orange colored frothy diarrhea, Droppings may be tinged with blood, Loss of appetite, Depression
Key Signs: Lameness, Pain, Difficulty walking, Irritability
Key Signs: Lethargy, Loss of appetite, Increased thirst, Huddling near neat source
Key Signs: Enlarged crop, Delayed crop emptying, Reduced feed intake, Weight loss
Key Signs: Pasty butt, White, sticky, shiny droppings, Drowsy, droopy, and uninterested, Can barely stand without swaying
Key Signs: Blindness
Key Signs: Bald spots on head, back or vent, Feather loss, Bleeding, Skin and possibly muscle damage
Key Signs: Atrophy of breast muscle and decreased body fat, Decreased growth/weight loss, Pasted vent, Diarrhea with mucus, increased white urates, blood or worms
Key Signs: Drowsiness, Huddling together, Poor growth, Chalky white diarrhea w/ pasted vent
Key Signs: Missing feathers, Aggressive behavior to other flock members, Chasing other birds, Ruffled feathers
Key Signs: Yellow droppings, Emaciation, Pale comb and wattles, Bloodstained tissue and feathers around the head
Key Signs: Accumulation of air under the skin, Soft, non-painful swelling under skin
Key Signs: Sudden death, Bird found dead, lying on their back
Key Signs: Emaciation, Weakness, Stunted growth, Weight loss despite a good appetite
Key Signs: Vomiting, Delayed crop emptying, Green droppings, Weight loss
Key Signs: Subcutaneous mass on neck, Depression, Weight loss, Difficulty swallowing
Key Signs: Abnormal gait, Lameness, Reluctance to stand, Decreased movement
Key Signs: Deformed toe, Swelling, Bleeding, Difficulty walking
Key Signs: Broken or torn toenail, Bleeding from the site of injury, Lameness may be present, A visibly damaged or crooked nail
Key Signs: Listlessness, Weakness, Depression, Watery white diarrhea
Key Signs: Witnessing hens peck at another hen's vent, Wounds around the vent area, Finding a dead bird with vent portion of their body pecked out
Key Signs: Inflammation (red, swelling) of the vent area, Straining to defecate, Soiled vent feathers, Presence of gas
Key Signs: Delayed crop emptying, Oral lesions inside mouth, Excessive beak rubbing, Sour odor from mouth
Urgent and chronic conditions affecting the oviduct, egg formation, shell quality, peritonitis, and cloaca.
Key Signs: Loss in appetite, Weight loss, Lethargy, Reduced egg production
Key Signs: Delayed onset of lay, Reduced egg production, Laying smaller, lighter, or poor shell quality eggs, Caramel colored, frothy feces
Key Signs: Weakness, Inability to stand, Soft, thin or shell-less eggs, Not laying eggs
Key Signs: Bulge hanging outside vent, Straining appearance, Preening excessively, Picking at vent region
Key Signs: Feather loss on the head, neck, keel and thigh, Scaly, dry skin, Weight loss, Decreased egg production
Key Signs: Abdominal distension or straining, Wide stance, Inability to perch, Persistent tail wagging
Key Signs: Misshapen eggs, Change in egg color, Laying soft (thin)/shellless eggs, Decreased egg production
Key Signs: History of laying misshappen or soft (thin)/shell-less eggs, Not laying eggs, Depression/lethargy, Reduced or lack of appetite
Key Signs: Lethargy, Pale comb, Listlessness, Swollen face and eyelids
Key Signs: Misshaped eggs, Calcium deposits on eggs, Calcium coated eggs, Speckled eggs
Key Signs: No eggs produced, Penguin-like stance, Reluctant to move, Swollen vent and/or abdomen
Key Signs: Listlessness/lethargy, Weight loss, Loss of appetite, Anemia (pale comb/wattles)
Key Signs: Ataxia, Torticollis (wry neck), Head tilt, Weakness
Key Signs: Perosis (slipped tendon), Short, thickened limbs, Lameness, Reduced eggshell strength
Key Signs: Decreased egg production, Small eggs, Thin-shelled eggs, Increased risk of bone fractures
Key Signs: Increased preening, Restlessness, Frequent scratching/irritation, Change in nightly perch location
Key Signs: Reduced or inconsistent egg production, Abdominal distension, Dyspnea, Weight increase
Key Signs: Ascites, Enlarged abdomen, Difficulty breathing, Pasting of vent
Key Signs: History of cessation of egg laying, Abdominal distension and ascites, Lethargy, Depression
Key Signs: Poor egg shell quality, Loss of egg production, Thin-shelled eggs, Shell-less eggs
Key Signs: Extensive lacerations, Decapitation, Missing bird or egg, Scattered feathers
Key Signs: Beaks are soft and rubbery, Bowed legs, Stiff-legged gait, Stunted growth
Key Signs: Cessation of egg laying, Abnormal eggs (lash eggs, shell-less, thin-shelled, misshapen, or ruptured), Poor body condition despite apparent weight gain, Lethargy
Key Signs: Dull, ruffled feathers, Change in feather color, Beak/nail overgrowth, Shrunken combs
Key Signs: Blackened vent feathers (which is caused by an accumulation of fowl mite feces, dead mites, and dried blood), Restlessness, Feather loss near vent area, Irritation, excessive itching
Key Signs: Pale comb and wattles, Lethargy, Weight loss, Reduced muscle mass
External blood-feeding mites, lice, scaly leg mites, intestinal worms, and bacterial foot lesions.
Key Signs: Lameness, Decreased movement, Stiffness, Reluctance to move
Key Signs: Listlessness, Blindness, Depression, Weakness
Key Signs: Fever, Weight loss, Green diarrhea containing excess bile and urates, Pale comb/wattles (anemia)
Key Signs: Lameness (often shifting between legs), Joint swelling, pain, and reduced mobility, Small soft swellings and nodules on feet, Difficulty walking or perching
Key Signs: Abnormal gait, "wing walking", Limping, Inability or reluctance to stand and walk
Key Signs: Head tilt (wry neck), Circling, Incoordination (ataxia), Seizures
Key Signs: Pale comb (anemia), Weakness, Irritable behavior, Feather loss
Key Signs: Dry, flaky skin, Lesions along the corners of beak and bottoms of feet, Perosis, Twisted leg deformity
Key Signs: Cloudiness or discolored eye, Misshaped or unequally shaped pupils, Limited to little reaction to external stimuli, Inability to recognize food or water when right in front of them
Key Signs: Brown or black scab on the bottom of foot, Discoloration at the bottom of the foot, Swelling, Lameness
Key Signs: Weakness, Loss of appetite, Ruffled feathers, Pale comb, wattles, eyelids or legs
Key Signs: White scaly, crusty circular patches or lighter diffuse areas on the comb, Combs appear to have been "dusted with flour or chalk dust", Ulcers covered by dark scabs, Feather loss
Key Signs: Bent or crooked toes
Key Signs: Toes curling inward
Key Signs: Feather loss along the back and neck, Broken or damaged feathers, Scratching, Restlessness
Key Signs: Swelling, Localized lesions or necrosis, Ants visible or mound nearby
Key Signs: Embedded dark brown fleas, Skin irritation, Pale comb/wattles, Frequent scratching/irritation
Key Signs: Chickens changing where they perch, Chickens become restless in the evening and don't want to go into the coop, Pale comb/wattles (anemia), Tiny dark specs (tick larvae) under the chicken's wings
Key Signs: Pale discoloration to blackening of tips and edges of comb and/or wattles, Blistering of comb, Edema in feet and/or legs, Blackening of feet and/or legs
Key Signs: Open wounds, Bleeding from eyes, ears, or mouth, Head tilting, Wry neck (twisted neck)
Key Signs: Swollen, inflamed (warm and red) footpads, toes and/or hocks, Lameness, Lethargy, Ruffled feathers
Key Signs: Arched back, Extending neck outward, Using wings to assist with walking, Walking backwards
Key Signs: Regurgitation, Weakness, Reduced appetite, Pale comb
Key Signs: Cement-like clusters in feathers, Redness and irritation of skin, Tiny insects on skin and/or feathers, Damaged and broken feathers
Key Signs: One leg stretched forward and the other back, Paralysis of the legs, wings, or neck, Torticollis, Incoordination
Key Signs: Poor feathering, Enlarged hock joints, Dermatitis, Twisted legs
Key Signs: Blackened vent feathers (which is caused by an accumulation of fowl mite feces, dead mites, and dried blood), Poor quality and/or missing feathers near vent, Pale comb/wattles (anemia), Restlessness
Key Signs: Incoordination, Paresis and inability to walk, Head tilt, Tremors
Key Signs: Chickens changing where they perch, Chickens become restless in the evening and don't want to go into the coop, Pale comb/wattles (anemia), Increased feather pecking
Key Signs: Unilateral lameness, Ataxia, Paralysis, Diarrhea
Key Signs: Weight loss, Pale comb and wattle, Occasional paralysis, Abnormal feathering
Key Signs: Torticollis (wry neck), Paralysis, Trembling, Polyuria
Key Signs: Flaking, crusting, scaling, or roughened skin, Uneven or lifting of scales, Thickening of the skin, Increased itching
Key Signs: Enlargement of the hock joint, One leg extended diagonally backwards, Acute lameness, Inability to stand and/or walk
Key Signs: One or both legs splaying outward
Key Signs: Lameness, Hock-sitting, Legs stretched out in front while sitting, Depression
Key Signs: Lameness in one or both legs, Ruffled feathers, Skin reddening, Fever
Key Signs: Ulcerated lesion (often chronic and never heals), Growth/mass, Difficulty swallowing, Weight loss
Key Signs: Progressive weight loss, Changes in behavior, Unilateral paresis, Paralysis
Key Signs: Sudden flaccid paralysis, Tiny dark specs (tick larvae) on chicken's skin, Depression, Recumbency
Key Signs: Loss of appetite, Torticollis (wry neck), Weight loss, Pale comb
Key Signs: Abnormal leg position, Lameness, Reluctance to move
Key Signs: Swollen foot pad, Swollen hock joint, Enlarged hock joints, Lameness
Key Signs: Progressive paralysis, Difficulty walking, Inability to rise, Sudden death after scare
Key Signs: Frizzled feathers, Shortened, thickened legs w/ an enlarged hocks, Dermatitis, Stunted growth
Dietary vitamin deficiencies, botulism limberneck, feed mycotoxins, plant poisonings, and lameness.
Key Signs: Loss in appetite, Undigested feed in droppings, Stunted growth, Weight loss
Key Signs: Seizure-like activity, Wry neck, Spinning, Ataxia (incoordination, stumbling)
Key Signs: Abnormal or deformed beak
Key Signs: Loss of appetite, Depression, Increased heart rate, Increased respiratory rate
Key Signs: Limp neck, Paralysis/muscle weakness, Difficulty swallowing, Droopy eyelids
Key Signs: Stunted growth, Thick, short bowed legs, Poor feathering, Perosis
Key Signs: Difficulty breathing, Blue-purple colored comb, Sudden death
Key Signs: Undigested food in feces, Feed refusal, Stunted growth, Diarrhea
Key Signs: Sudden death, Obesity, Pale face, comb and wattles, Dandruff on comb
Key Signs: Poor feathering, Weakness, Stunted growth, Chicks die after piping shell
Key Signs: Dark reddish-purple, weepy areas of the skin, Blood-tinged watery fluid under the skin, Loss of feathers, Reduced feed intake
Key Signs: Stunted growth, Paleness, Undigested feed in feces, Poor feed conversion ratios
Key Signs: Feed refusal, Diarrhea, Blackening of the comb, toes and beak, Decreased egg production
Key Signs: Rapid weight loss, Lethargy, Huddling, Decreased appetite
Key Signs: Hyperemia of combs and wattles, Hypersalivation, Vomiting, Diarrhea
Key Signs: Diarrhea, Crop stasis, Difficulty breathing, Ataxia
Key Signs: Poor growth, Perosis, Flaking skin, Thickened areas forming on feet
Key Signs: Jerky nervous walking, Aimlessly running and flapping wings, Facial swelling, Weakness
Key Signs: Loss of appetite, Lethargy, Neurologic behavior abnormalities, Excessive drinking
Key Signs: Hemorrhaging (internal or external bleeding), Pale colored comb and wattle, Weakness, Lethargy
Key Signs: Retarded growth, Poor feathering, Decreased egg production
Key Signs: Increased thirst, Difficulty walking, Depression, Weakness
Key Signs: Difficulty breathing, Open-mouth breathing, Lateral recumbency, Incoordination
Key Signs: Head tremors, Reduced appetite, Weakness, Ataxia
Key Signs: Feather picking near the tail base, Poor feather condition, Feather loss near the gland, Bleeding, scabbing, swelling or redness near the gland
Key Signs: Stunted growth, Loss of appetite, Poor feather quality, Reduced egg size
Key Signs: Penguin-like (weak) stance prior to laying an egg, Decreased egg production, Thin or soft-shelled eggs, Small eggs
Key Signs: Rough, dry skin, Eye inflammation, Ruffled feathers, White-yellowish mouth sores
Key Signs: Hemorrhages, Thin blood, Poor clotting
Key Signs: Ataxia, Torticollis (wry neck), Muscle spasms, Greenish-blue skin discoloration
Key Signs: Ataxia, Pale comb, Dark or bright green diarrhea, Paresis
