Although if your pet doesn't have an adverse reaction to on the spot flea treatments it looks like zoguard's down to $28 for a 3 month supply (on domyownpestcontrol) which is pretty good. I guess it depends on whether or not you mind chemicals like that, food grade diatomaceous earth is super...
To add to that, it looks like Zoguard retails for $28 at Domyown, so ~8 dollars cheaper (via Amazon) per three month supply then Frontline Plus, but they unfortunately don't ship outside of the continental U.S...
You have to alternate using them, otherwise the fleas will gradually build up resistance to them. I switch between ZoGuard (good Frontline generic) and Advantage, although I have had to use food grade diatomaceous earth on occasion. Use one of those, occasionally dust (with the DE) then vacuum...
The only reliable Frontline generic I know of is ZoGuard, it's much cheaper and doesn't seem to have the large amount of adverse reactions that a few of the other Frontline generics have.. Maybe consider food grade diatomaceous earth as well though? It's more difficult to apply but your cat...
Personally I'd stick with ZoGuard, it seems to be the most reliable clone of Frontline to date (but is reasonably priced) and I've heard way too many people complain about adverse reactions to Fiproguard and Pet Armor.. Although if your cat has a reaction to Frontline/ZoGuard you might just want...
I second not using that stuff, Novaluron is specifically labelled as "not safe for cats" so even using it on a dog (if it comes into contact with your cats) could be bad. After some research it looks like the only generic that has the same active ingrediants as Frontline's newest formulation is...