My dog has a spreading skin infection from a collar. How to treat?
That looks like a pretty nasty hot spot. Hot spots are caused by chronic moisture against the skin (which is common with a collar or something else wrapped around the neck). The best way to treat a hot spot is to clip the hair from the area so that it can fully dry out. You will need to use buzzing clipper, not a razor or scissors. You can try an OTC pet antimicrobial spray, but often prescription sprays or ointments work a little better since they contain a steroid and real antibiotics.
You may also have to get creative in finding ways to prevent Peyton from scratching this area, as that will delay healing and can damage the skin. You can try socks, dog booties, or bandaging the feet to cover the nails. Unfortunately, due to the location, he won't be able to use an e-collar.
If the hotspot isn't looking better in 48 hours, I would recommend that you have Peyton checked out by a vet.
Updated on September 23rd, 2025