This mama has been feeding 3 babies. She needs some groceries. Feed her! Drop Some quality food (dog food? Pig chow?) in a place where she can find it. Then let her get satiated and see if she wont get her little family put to bed. If not, we need to assume some responsibility for creating this problem and find a solution. What a shame to put down 4 bears just because humans cannot be responsible. Can we relocate them?