Fleas are a common problem in dogs, especially in areas with warm and humid climates. According to the American Kennel Club, nearly all dogs will experience a flea infestation at some point in their lives. Fleas are highly adaptable and can survive in a wide range of environments, including indoors and outdoors. They can easily jump from one host to another, making it easy for them to spread between animals. In addition to causing discomfort and irritation, fleas can also transmit diseases to dogs, such as tapeworms and bacterial infections.