A stray cat had kittens under our house. They are at least 6 weeks old and are infested with fleas. They are bleeding very badly. I’m not bringing them in my house as I do not want my dog or house infested, but I feel horrible for them. I tried giving one a bath, but they are so covered I don’t even think it helped at all. Can I give them flea drops or put powder on them? Will it help any since they are staying outside?