I would get a vet out to see what they say. When I bought April she had one on her but and it jiggled. The seller had had a vet out (and had paperwork to prove it) and the vet suggested letting it go down on its own unless it didnt improve. He said that opening it up to drain it could potentially cause infection and since she wasnt in the show pen or anything to just let it do its course. It took a month or two but it went away...just looked funny. But every situation is different so I would call a vet.