And that way, you can see any fleas or flea droppings, known as flea dirt, that is sitting at the base of the hair shafts. But, definitely focus on the areas where the hair is thin. The cowlicks ...
Just part the hair at the base of their neck ... is evidence of fleas," says Collins. Signs of fleas may include increased scratching, small red bumps on your puppy's skin, or flea dirt.
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