Don't follow his advice!It could kill your bunny! Just give him a flea bath in your bath tub or set tub,don't use strong shampoo just use dish liquid but don't put too much on,make sure you get it out of his fur,then dry him well.while he is wet get some tweezers or use your fingers and get any fleas that you see off your rabbit!Advantage would definitly kill your rabbit,you have to put it on the rabbits back of his neck,a rabbit can reach the back of his neck and it will kill him if he licks it off.