I've never had a flea problem but I had a mosquito and no see ums problem. Every 6 weeks I spray all kennels and yard with Cutters Back Yard Bug Control. Just hook it to a water hose and spray everything. It's a good
all around preventative for me. One bottle will last you all summer. Maybe try it along with the stuff Mike and
halfbreed are reccomending.
Jimco a friend told me about this stuff and I looked for it a while back and couldn't find any