SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/cat-fleas-flea-dirt

Merck describes flea excrement on a cat's skin as what shape and color?

Reddish black, small pellets or commas.

Start playing free

  1. Bright green and flat
  2. White and square
  3. Reddish black, pellet or comma shaped ✔

Why: Flea dirt is flea droppings, found by parting the fur. Merck says it dissolves to a reddish brown on a damp paper towel. If you see it, ask your vet about safe treatment.

Huh, didn't know that: Merck says flea allergy dermatitis can also cause widespread hair loss.

The dad joke
What was the special offer at the pet store this week? Buy 1 Cat get 1 Flea!
Like this card?
Play the game

References

Answer: Reddish black, pellet or comma shaped. Flea dirt is flea droppings, found by parting the fur. Merck says it dissolves to a reddish brown on a damp paper towel. If you see it, ask your vet about safe treatment.

  1. Merck Veterinary Manual, Fleas of Cats www.merckvetmanual.com/cat-owners/skin-disorders-of-cats/fleas-of-cats
    Flea excrement is reddish black, cylindrical, and pellet- or comma-shaped.
    Checked 2026-10-10.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

CatsPer iCatCare, what share of fleas are in the home rather than on the cat?CatsHow do cats get tapeworm from fleas?CatsWhich germ causes cat scratch disease?

That's stuff everyone should know.