When four legged creatures either go off their feed or fail to demonstrate a properly functioning gastrointestinal tract at the other end, we call the vet. Yet

When four legged creatures either go off their feed or fail to demonstrate a properly functioning gastrointestinal tract at the other end, we call the vet. Yet somehow it's considered uncouth to reply, when people ask how you're doing, with a reassuring "I eat and I shit"?