House and yard flea treatment is crucial to ensure your dog or puppy remains flea free. Even if you treat your dog for fleas or ticks after an infestation, he is at risk for more flea problems if the outside source is not eliminated. Existing fleas and larvae in the house can be killed using different carpet flea powders or flea bomb foggers. Re-infestation can be controlled up to 6 months with these products. Using a flea and tick spray in your yard can help control problems where your dog may spend lots of time outside.