Ive had a problem with my dog the past few days of training. I'll just stick with todays training. I took her out, set up a line of bumpers out to about 100 yards and sent her on multiple backs until she picked them all up. The first few she grabbed were at a speed just over a walk. She livened up for the next few and trotted after them and then the last few she was a bit faster. Then I worked with her on hand signals for lefts and rights. We have done these a thousand times in the past and she is solid on them. She followed the commands but the same thing happened as before. She just kind of trotted over there like she didn't really care. Next, I gave her a few fun bumpers to break up the boredom. She went after them with a little more effort than the backs and overs but she still didn't hit it with her normal enthusiasm. After about 10 of the fun bumpers I decided to just cut the training short and go home. On the way home I was beginning to think she may be sick or something but when I got home and started to feed her she went crazy like she always does and upon finishing her meal went right for one of her toys and wanted to play. Anyone got any ideas on whats going on?