I have just notice a growth bulging at the end of my male dogs penis. This is a large almost the size of an egg mass. I checked and thought maybe a testical had dropped but it didn't. This is a 12 year old begal and he also has recently gotten several missing spots of hair with soars forming. Don't know what mainge is but that is what came to mind. I have a vet appointment set for Wednesday but was courious.
Your pet needs to be examined to determine what this is. good luck, vetcare