I have a 4 year old ferret named Scottie that has become infested with fleas. We had a wet spring and summer, and the dogs and cats got them, and now Scottie has them too. I want to treat him with a topical solution. I've been spraying him with cedar spray and dusting him and his cage with DE, but he needs something more. He's getting sores, and I want the stupid fleas GONE! I had been told once that I could use Bio Spot, but I can't seem to find it online at PetCo or Drs Foster and Smith. Anyone know what I can use on him? And is there anything I can use in his cage to keep him from getting reinfested again?