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It feeds on the blood of the animal leaving tiny, itchy bites behind. They bite them, suck their blood, and make life incredibly itchy and unbearable.

They can also give them other parasites and diseases, and if left untreated for too long, can cause anemia and death. Some animals will bite and scratch so excessively, that they make a painful, red, irritated area, called a 'hot spot.'

Also, some animals are allergic to fleas, so get them to a vet as fast as possible! Your veterinarian will know what to prescribe to rid the animal of fleas.

As a matter of fact, a cat I know is allergic to flea preventatives, so a flea outbreak would be horrible.

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Wiki User

16y ago
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6mo ago

A flea feeds on the blood of the animal by biting into its skin, causing irritation and potential Allergies. Fleas can also transmit diseases to the animal, such as tapeworms or Bartonella. Infestation can lead to hair loss, itching, and skin infections.

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Q: What does a flea do to a animal?
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