This is the 1st time I’ve ever dealt with fleas. I have 6 cats two outdoor an 4 indoor. I put a collar on each one. Its hartz seven month protection….anyway indoor cat neck starts weeping like pus or something after 3 days of wearing said collar. The collar was loose and it still looked like his skin was stuck to the collar. He has severe chemical burn why are these people still allowed to sell this product????