Head or neck crepitation, crepitus
Head pressing
Head shaking, headshaking
Head tilt
Head, face, ears, jaw weakness, droop, paresis, paralysis
Head, face, ears, jaw, nose, nasal, swelling, mass
Head, face, jaw, tongue atrophy, wasting
Head, face, jaw, tongue atrophy, wasting
Head, face, neck foreign body
Head, face, neck spasms, myoclonus
Head, face, neck, tongue hypoesthesia, anesthesia
Heart murmur
Heat on palpation penis
Heat on palpation prepuce
Heat on palpation scrotum, testes
Heat, nail, claw, hoof, hot, warm
Hematemesis, vomiting blood
Hematuria, blood in urine
Hemiparesis
Hemoglobinuria or myoglobinuria
Hemoptysis coughing up blood
Hemorrhage of any body part or clotting failure, bleeding
Hemospermia, blood, red semen
Hepatosplenomegaly, splenomegaly, hepatomegaly
Hindfoot pain, rear foot
Hindfoot swelling, mass rear foot, feet
Hindlimb atrophy, wasting
Hindlimb foreign body, rear leg
Hindlimb hypoesthesia, anesthesia rear leg
Hindlimb lameness, stiffness, limping hind leg
Hindlimb or pelvic crepitation, crepitus rear leg, pelvis
Hindlimb pain, hind leg
Hindlimb spasms, myoclonus
Hindlimb swelling, mass in hind leg joint and/or non-joint area
Hoarse chirp in birds
Hyperesthesia, irritable, hyperactive
Hyperextensible hyperelastic skin
Hyperkeratosis, thick skin
Hypertonia of muscles, myotonia
Hypertrichosis, too much hair or failure of shedding
Hyphema, blood anterior chamber of eye, "black eye"
Hypopyon, lipid, or fibrin, flare, of anterior chamber
Hypothermia, low temperature
Hypotonic, wrinkled skin