Lump In Between Legs Just Overnight My Veteran Pony Has Developed A Large Solid Wobberly Lump Between His Two Front Legs.?

Just overnight my veteran pony has developed a large solid wobberly lump between his two front legs.? - lump in between legs

This did not seem to affect some way.There is no evidence that he bites. It's taken almost as a piece of muscle has and will be suspended. We have the vet for her booster shots in a few weeks. To someone else the same kind of symptoms that would have on his horse, it is interesting to the vet before?