My dog had a small pink bump on his back. He had a small cyst on his chest once and we took him to the vet and everything was fine it went away so I left this "bump" alone as well. I just noticed it seems a bit bigger and had a bit of a scab on it so I picked at it and part of it came out and now it looks like a small pink lump that has opened. Has any one experienced this before? Is this characteristic of a cyst and should I wait a bit or should i make an appointment with the vet right away?