I never thought I would say this but thank goodness for vets. I have been reading an old book about cats, and I am horrified at the medical suggestions. It is Cats: their Points and Characteristics with Curiosities of Cat Life and A Chapter on Feline Ailments, 1876, by W. Gordon Stables, a retired sea doctor who also wrote Medical Life in the Navy.
The illustrations are weird. Did you ever see cats like these? The anecdotes are odd - one about a tom cat on board a ship threatened with being shot by the captain. And there is even an ad for a cat medicine chest (see last illustration). His remedy for diarrhoea is this: