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@Oreodog sorry for any confusion this may have caused. Personally, I am always an advocate of at least calling your vet and letting them know that you have a concern. I don't have any experience with any bumps like that but if it were my dog, I would keep track of the size and see if it grows. Make note if it seems like it may be causing your pup any pain or discomfort. Of course, if any blood or liquid comes out, I would be concerned. This info will all be helpful for your vet to know. Good luck!
Hi I know its been a while since you posted this but I was wondering if you figured out what the bump was? My little terrier has identical bump... it seems to be driving her crazy. I tried to respond to this post a few minutes ago but I don't think it worked...sorry if I sent it twice.