Equid, Pony: Abdomen. Peritonitis following intestinal perforation.

Equid, Pony: Duodenum. Duodenal perforation.

Equid, Pony: Duodenum and normal small intestine. Eosinophilic duodenitis with severe smooth muscle hypertrophy.

Equid, Pony: Duodenum. Eosinophilic duodenitis with severe smooth muscle hypertrophy.

Equid, Horse: Duodenum. Duodenal perforation, diffuse eosinophilic enteritis, muscular hypertrophy.

Equid, Horse: Duodenum. Duodenal perforation, diffuse eosinophilic enteritis, muscular hypertrophy.