Well she went to the vets yesterday but as it was an emergency appointment they couldn't really do much. The vet thinks it may have started growing near her tail as that is where it is "attached" the most. We now have to think whether to have a sample taken to see if that reveals anything and/or have her put under to have it removed. We're gonna take a couple of days to think about it but as it isn't affecting Obi at all the vet was reasonably optimistic about it not being anything nasty.
Thanks for the positive thoughts
