Has anyone ever heard of this or used it? It is what the shelter is selling now. I'm a little nervous to use it since I've never heard of it. Even my sister is not familiar with it (she is a vet tech). I bought a package, but want some feedback before I actually use it.

I'm researching it online and saw something that said it was made by Sargeant's. It is a Novartis product. So I don't know what to believe.