Hello and thank you for contacting Petco Pet Education Center, formerly Petcoach. It looks like a skin tag. However, the fact that the area is bald suggests that Tripp has been scratching or biting on it. Please, monitor the area for a few days. If you notice that the tag is getting bigger or if it is bothering Tripp, you should get him checked by your local vets. In that case, surgical removal of the wart may be necessary.