Question

if a horse is not growing, has a rough coat, distended abdomen, and is weak; what is likely the cause?
external parasite
internal parasite
distemper
influenza

Explanation:

Internal parasites in horses can cause poor growth, rough coat, abdominal distension (due to issues like intestinal blockage or damage), and weakness as they compete for nutrients or damage the digestive system. External parasites (like ticks, lice) mainly cause skin issues/irritation. Distemper and influenza are viral diseases with different symptom profiles (e.g., respiratory, neurological for distemper in some species, respiratory for influenza) not matching these GI - related symptoms.

Answer:

B. internal parasite