How Do I Know If My Dog Has Fleas?

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There are a number of ways to check for fleas on a dog: observing changes in behavior, combing to look for flea dirt, finding tapeworm segments or larvae and noting hair loss. Fleas not only infect dogs, but they also invade their environment, such as their bedding and feeding area. Infected dogs require prompt treatment; fleas promote anemia and affect humans as well.