7 seresto collars, 3 dogs 4 cats
This is the 3rd year using the collars. We have 3 dogs and 4 cats. This year we've bought 2 for each animal thinking the 1st was a bad batch, but the 2nd collars didn't help at all with fleas either!!!! Very disappointed considering the money that's been put into these and them not work!!! What changed? 😧