If you spray your yard with malathion you will kill the fleas in your yard, most likely were he is getting them unless you take him on runs in the woods and such. Malathion will also get rid of the other pests in your yard such as ticks, chiggers, and skeeters as well.
I also did this when I had a dog.
never wore a flea collar, never sprayed with flea spray, it just works.......
also works on army worms and chinch-bugs....
