Your dog's fur is a good indicator of its overall health. If your dog has black spots on its fur that it scratches often, then your dog probably has fleas.
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Fleas
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Feeding on the blood of host animals including dogs, fleas are parasites capable of consuming up to fifteen times their weight in blood.
Symptoms
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If your dog has fleas, symptoms you might notice include black flecks or spots on its fur as well as increased scratching, according to "What Your Dog Is Trying to Tell You". The black spots are often found on a dog's stomach.
Environment
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The ASPCA says fleas are often found in warm, humid environments. Dogs that go outside in these areas are at risk for infection and experiencing the symptoms of black itchy spots.
Treatment
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Your veterinarian can recommend shampoos, powders and topical treatments that will kill fleas, eliminating the itchiness and black spots on your dog's fur.
Considerations
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Some dogs are more allergic to fleas than others. If your dog is sensitive to flea saliva, it could experience sensations of intense itching, leading to more scratching, scabs and even skin infections.
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