Pets? What about the rampant use of antibiotics in the factory farm industry? A couple pets aren't going to matter nearly as much as antibiotic resistance in meat and poultry.
Some Vets might keep this a secret but Cats get a kitty cold flu thing sometimes and what works for us is one of these. this thing.jpg You stick the end in the side between the teeth and water them often. Then go get some of this in the little plastic container, best chance they eat. cat food whiskas.jpg You can still take them to the Vet if you want but I think you should do what I said also.