While Clyndamycin, Baytril, and Clavamox are all powerful antibiotics, they each tend to be suited to different types of infections. I'm no expert on which ones are good for what but seems at work they use Clavamox for bad kitty respiratory infections and abcess wounds, Baytril for the very very sick kitties, mostly as an injectable and never on older kitties, and Clyndamycin they tend to use with cats with dental problems and mouth infections.

Clavamox is a bitter tasting thing, and yes the pill form seems to be worse. Even with using FlavorX some cats just plain balk at taking it.

If your vet and your cat are agreed to it, probably taking the cat in for injectable antibiotics would be easier. We've had several clients do this that either didn't have someone to help them medicate the pet or if the pet was VERY fiesty about taking meds.

Good luck.