If it is cooler or rainy now it is a good time to broadcast (via hose end sprayer, watering can, backpack sprayer, there are various methods) beneficial nematodes around the house and in any kennel and general traffic areas for your dogs. Put them out on a cloudy day or in morning or evening. They do best when they can get down into moist soil and not be exposed to bright sunlight. You buy them from a refrigerated supply in places like feed stores or via overnight shipping. The package of stuff is poured into a bucket and allowed to spread out into the water. You can filter the water through a paper sieve often provided with them so your sprayer doesn't clog. Once you mix them keep the tank agitated and spray them pretty quickly (they won't survive in the water for a long time.)

They may seem expensive for the application, but if you have a large yard and buy the larger package, putting them out now in the fall should take care of fleas in the entire yard for the fall and into the spring. You can redo again next year, but they stay in the environment and they kill flea eggs in the soil stage.

SRS