It's entirely related to labor. I'm not trying to argue one point of view or another but in my opinion we won't see tremendously improved supply until the fear of transmission in the plants is negated. A lot of companies are also advising anyone 60 or older to stay home. They could represent 10% or more of a plants workforce and generally the most reliable. Analysts are expecting prices to fall like a rock in Q3 with supply coming back to normal levels but they also didn't expect this to last two and a half months already.
As for the fall, that depends on if we see a repeat in cases and how the media/govt responds. Again, just my opinion. I could definitely see things going south again.
http://www.agcenter.com/newcattlereport.aspx