i just rescued to kittens, im not sure how old they are, maybe about 6 weeks. I have them in my garage right now but it’s getting cold and I want to bring them in the house. They are covered in fleas and I don’t want them to get to my dog. Iwasn’t sure how to get rid of them, I read somewhere that shampoos can be toxic to kittens. How can I get rid of all the fleas?