My Border Collie mix, Bonnie, is six-months-old. She has what I can only describe as "warts" growing on her gums...a few on the outside of her mouth and DOZENS of them on the inside of her mouth...especially along the back of her mouth (crease of the lips). They don't seem to bother her at all...just look like fleshy pale bumps. Is this something we should be concerned about? Our other pup (a Border Collie/Blue Heeler mix) had a few of these when she was Bonnie's age, but they're gone now. What is this? Will Bonnie's also go away on their own? She's going to the vet next week to be spayed and I plan to ask him about them. Her inner lips in the back are just covered. YUCK.