outside.What can I do?? Since I live in an apartment, I cannot fog or treat the grass outside. The vet said he does not show any evidence of "having fleas" but I find 2 or 3 on him when he comes back in from going potty. He already took Sentinel and Capstar from his vet, but these adult fleas are still getting on him from outside. Is there anything I can put on him so the fleas don't get on him at all? HELP!