Hi there and thank you for using Petco Pet Education Center, formerly Petcoach to address your concern. Based on the photo you have provided, it appears that Winston has a rash / irritation on his abdomen. I would recommend using an ointment such as Sentry Wound Ointment, which can be found at PetCo and apply twice daily until resolved. If there is no improvement or it worsens, I would recommend having Winston examined by a veterinarian so that the most appropriate diagnostic and treatment recommendations can be made. I hope this helps! Please let me know if you have any other questions or concerns and I would be more than happy to help you further.