My former friend for various reasons gave me her two rats that are in terrible condition and absolutely infested with fleas/lice. The one is an absolute bloody mess. On Monday I took them home and bathed them in dawn and then sprayed them with 8 in 1 small animal flea and tick spray. I repeated the process yesterday but I also shaved them with a clipper (except their heads and other sensitive areas). My only question is how long do I have to repeat this process. They absolutely hate it and I want to put them in their nice big cage instead of the tiny one I'm keeping in the bathtub.