Hey everyone. I found 3 little kitties and they have a ton of fleas. They are around 4 weeks old now. I found them in my front yard. They're super cute and I want to be able to hug and socialize them, but the fleas are bad and I don't want to put anything too harsh on them. I have used the petroleum/comb method, but it obviously didn't work. I heard that Listerine works, but am scared it is toxic.