I am not sure how much it affects the situation we have in the market, but black bears usually enter their dens sometime between early November and mid December. Once they're in, they'll hibernate for around 100 days, or slightly over three months. Bears are unique, though, in that they aren't "deep" hibernators.
Source: wildlifeinformer.com...k-bears-most-active/
Life needs balance to work properly...taking from one side too much can lead us somewhere we don't like to find ourselves. Just saying that i wouldn't like bears that are hungry before they'll hibernate.