What is a major concern associated with fleas in pets?

Fleas are a significant concern for pet owners primarily due to their ability to cause skin allergies in pets. When fleas infest a pet, they can lead to flea allergy dermatitis (FAD), which is a hypersensitivity to flea saliva. This condition results in severe itching, excessive scratching, hair loss, and secondary bacterial infections. Fleas can also transmit tapeworms to pets if they ingest infected fleas during grooming. While fleas may cause other issues, the skin allergies are particularly prevalent and directly tied to the irritation and allergic reactions that fleas provoke through their bites and saliva. Understanding the impact of flea infestations on the skin is crucial for effective treatment and prevention strategies.