Well I bought HartGard Flea Drops for my 7 pound toy poodle and used them 2 days ago. She woke up the next morning with the most disgusting yellow liquid diarrhea ever. There had been no changes in her diet so I know this had to be the cause. I have bathed her twice and will Not be using these drops again. I hope she is okay and I Will be purchasing the expensive stuff from now on. Don’t buy this crap it’s not even worth it.