Kari, I am so sorry that the news wasn't better. It's so hard. I lost my first grey, KC, to osteo in 2003. I just hate it!
Edited because it posted twice.
Definitely go to the vet. Last week my Skorch totally ripped his entire toe nail off. I was more upset than him, but a trip to the vet was reasuring to me and I felt better when it was totally wrapped.
I have a June Bug too. Last September she tore her achilles at the dog park. It was a very expensive and worisome ordeal. We've sworn off dog parks for good.
I hope your Junebug is okay.