I got my kitten from a shelter about a month ago and he came home with fleas. He scratches his neck occasionally and someone in the house got a few flea bites. I don't think they're too bad because I don't feel any scabs on his neck. I ordered Frontline Plus today. Should I give him a bath before I do the Frontline? I don't have any flea shampoo. I've usually washed my cats with Dawn. Is there a special shampoo I should use that's safe? I don't know why we still have fleas here since it's 20-30 degrees. Any suggestions?