So far 1 of your 4 GSDs, what would you do? I have not had to use meds for over a yr now. Used Frontline a yr or so ago. Now, just found fleas on back above tail of our Shadow. Flakey skin & very slight raw spots. I hate to treat all, but not sure? Skyrah is 6 almost 7 months & never had a flea med on. So, if I decide to treat, use what? I did put a FL Plus treatment on Shadow just today. Any suggestions? Hate fleas & did always did use FL Plus 2 x a yr. Thanks much....