My sons rescue Rottie, Leo, has developed a small lump which resembles a pimple on the top of hjis nose. It does not seem to bother him and has not gotten any larger over the last two weeks. I take care of the dogevery twoweekends when they visit us. has anyone else experienced similar situations with their Rotties? I had someone who had Rotties tell me they are common. Any info would be greatly appreciated.