Hello. The skin issues that are shown in the photos are what we call "hotspots". These are moist bacterial infections that can be caused by a number of things including fleas, allergies, trauma to the skin, too much swimming, etc. The infection itself is very itchy and uncomfortable. Sonny should be seen by a veterinarian to assess if there are any other things going on and to have these areas clipped and cleaned. Your vet will most likely prescribe a combination of topical and oral medication to clear the infection. He may also require and anti-inflammatory, anti-itch medication...but your veterinarian can discuss all of that with you. Thank you for using Petco Pet Education Center, formerly Petcoach.