Looking for manga title

No.9904583 ViewReplyOriginalReport
I remember reading a short story at the end of a manga that involved a boy who made friends with a cow, and in the end he apparently accidentally ate his cow friend to cure a disease. If I remember correctly it was just a little short story at the end of a longer manga. If anyone knows the title of that manga, I would be grateful if they would tell me. In return, a pretty Utena pic. ^_^