Img 1 Flea dirt is dry feces. It appears as dark red or black specks in pet fur.
Img 2 Flea dirt in the fur of a white cat.
Img 3 Flea dirt will smear red on a wet paper towel, because it consists of host blood.
Img 4 A flea feeding and excreting fecal blood on a host. The feces drys and falls off the host during grooming. It’s the primary food for larvae in the environment.
Img 5 Flea larva eating a coil of fecal blood (flea dirt).
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