MetaChat is an informal place for MeFites to touch base and post, discuss and
chatter about topics that may not belong on MetaFilter. Questions? Check the FAQ. Please note: This is important.
Naw, just a pill for an infection. Big cat thinks the smaller one is his mommie. When smaller cat gets tired of the pestering he grabs big cat by the throat like mommie cats do. Mommie cats don't break the skin but sometimes Kitty does and it causes $100 vet bill and some blood letting (me).
The only way is to figure out what food it is on God's green earth that your cat craves above all others. For the dear departed Andy Warhol, most psycho (and most often medicated) cat I ever had it was vegetarian pate. Or doughnuts. For one other cat it was Doritos, another craved scrambled egg. Once you've got that down, pill giving is easy.
Unless, of course, you have a cat who doesn't like anything all that much. In that case, well, bummer.