I lost one cat to kidney failure and feel like it was because he licked the strip on bio spot product. Another cat had a reaction to the Sergeants Gold Spot on and I just about lost her, but my vet pulled her through. It took about 3 months and 6 different anti-biotics. Then like an idiot I put a Hartz 2 and 1 flea collar on her and she had a respiratory infection which cleared up as soon as I took the collar off.
I use Nature’s Guardian on my dogs, but cannot find it in this area for my cats.
Please research what you are using on your pets.