mysterious lump

Have any of you had experiences with little bumps on your dogs' skin? Sadie has what we assume is a mole. It has a wiry little hair growing from it like I've seen on humans. There is another little bump similar to it on her thigh and we assumed that it was a mole as well, but it seems to have gotten just a little bit bigger. We intend to call the vet, but I wanted to check with you guys as well. Is it a mole or is it something potentially dangerous?