Is there any safe remedy for a pup under 5lbs outside of manually removing them with a flea comb and tweezers? I'm on the road right now and sleep mostly outside. I just got her last night and i'm assuming fleas are from the house. I've pulled at least 10 off so far. She gets carried in my flannel shirt when its chilly and slept in my sleeping bag last night. Other than her occasionally scratching the infestation doesn't seem too bad.