My dogs have always been on Interceptor Flavor Tabs and have never had any worms whatsoever since. They are more than glad to take it ant actually look forward to it. They take it just like a treat with no fussing or having to force it down.They are quite expensive if you own a heavy dog, large or giant breed but do the job they claim to do. They also have monthly reminder stickers so that you can mark your calendar. I really like that as it could easily be forgotten since it is only given once every month. The only downfalls I see is the price and the fact that some dogs may not be able… read full review »