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January 18, 2026

How to Tell If Your Dog Has Fleas

Pet Care DaveC11·2 min read
How to Tell If Your Dog Has Fleas

Constant scratching isn't always fleas — but it's the first thing to rule out. Here's how to check your dog properly.

Constant scratching, biting and a restless dog can point to a flea problem long before you ever see a flea. Because adult fleas are fast and hide deep in the coat, knowing how to check properly is the first step to keeping your pet comfortable.

The Tell-Tale Signs

Fleas leave clues even when the insects themselves are hard to spot. Watch for these:

  • Persistent scratching, licking or biting — especially around the tail base and belly
  • Small red bumps or inflamed, irritated skin
  • Tiny black specks (“flea dirt”) in the coat that turn red on a damp paper towel
  • Thinning hair or hot spots from over-grooming

How to Check at Home

Run a fine-toothed flea comb through your dog’s coat over a sheet of white paper. Comb against the direction of hair growth and pay attention to the neck, tail base and inner thighs. Any dark grit that reddens when wet is a sure sign of fleas.

Catching fleas early means treating one pet — not your whole home.

If you find fleas, act quickly. Our weight-based flea pills start working within 30 minutes, and monthly dosing keeps them from coming back. Not sure which size to choose? Our parasites guide breaks it down.

D
DaveC11
Writer at The Best Dog Products — passionate about keeping pets healthy and happy.

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