I need some help from long-time dog owners here, I feel like I have a baby who won't stop crying and I can't figure out why. Sierra has been acting very odd this evening. She keeps going into her crate, lying down (but not sleeping) and randomly pawing at the bars whining/yelping (occasionally she'll let out an actual bark, but she knows she isn't supposed to bark inside, so she's mostly keeping it to whining). When she comes out of her crate, she paces around the apartment a bit, following us whenever we move, pawing at us. The crate behaviour is most definatley the oddest of all of this. She hardly ever chooses to go into her crate on her own, add the whining to this and I'm just confused. I've tried everything. She doesn't want to play, she doesn't have to go out (we did, she peed and pooped and that didn't stop the behaviour when we came back in), she isn't hungry (I fed her at normal dinner time), she had a big play today so she shouldn't have any unusual pent-up energy (but she doesn't want to play now, which she usually does if she's just wound up). I DON'T GET IT!!!!