Hi and thank you for using Petco Pet Education Center, formerly Petcoach. It is hard to see the photos but I am glad that WInston is not bothered by the bumps at all. They look very small and I would not be concerned at this time. They may be small bug bites, an allergic reaction to something, or something else. If they get bigger, become red or have any discharge or if they become bothersome to Winston, I would get them checked out by a veterinarian. For now, I would just continue to monitor them as long as Winston is comfortable!