A lot of the “cheap” brands or preventatives are not good for dogs/cats. Please only give what is recommended by a licensed veterinarian. We have had cases come in, where dogs are tremoring, seizing, and excessively drooling.
I have heard about the cheaper stuff and have actually thought about switching also. I always do a little research before switching, because my dog has allergies. What I found is that the cheaper stuff only has one of the two ingredients in frontline. I believe the cheaper stuff has the ingredient to kill what they already have but not the ingredient to repel or keep new stuff from getting on them.
I've tried about everything on the market. Certain brands you need to be careful about as I had a friend who has a service dog that has kidney problems due to using the cheap flea drops. I highly recommend this product if you are trying to protect your dog from fleas.if your dog has a flea problems make sure to treat the yard and house and your animal as I don't beileve this product should be used in infestation.