fleas in dog hair. fleas run around the dog. close-up

fleas dog hair run close flea parasite wool pet disease skin many red insect small pest bite mite cat macro fur lice puppy veterinary texture leprosy closeup infection insecticide plague extermination devour pattern canine furry contamination blood animal background treatment illness irritans sick natural ctenocephalides pulex disinfection sarcopsillosis harmful medicine health brown problem