
Overview
Fleas are the most common parasite affecting dogs in the UK. They thrive in warm, humid places — including our homes. Dogs can get fleas from other pets, wildlife, or even from us if we bring them indoors on our clothing or belongings. Once they are on your dog, fleas bite, feed, and lay eggs. They quickly multiply and can cause nasty itching, scratching, hair loss, and sometimes more serious conditions.
The usual way dogs get fleas
Flea life cycle
Spotting the signs: symptoms of fleas in dogs
Treating dogs for fleas
Flea treatment for home
My dog keeps getting fleas even after treatment — help!
Medically reviewed by
Published on 08/06/2025 • Reviewed on 08/06/2025