Whenever I do training sessions with Eva she gets overexcited and does what we call "snapping." She bites the air at me like she is trying to make me do something, and she barks a lot. She only seems to do this inside, and it seems like she gets too overexcited, so she is barking and trying everything she can (she rolls over, speaks, etc) to get the treat. So I think the snapping is from stress in this scenario (she also does it when she gets impatient to go outside, etc). How can I stop this? She seems confused, and impatient, so she speaks, rolls over, and does everything she knows. She knows commands well, but I think when she gets overexcited, every thought in thinking is overruled by that treat. She loves toys as a reward, but that seems to overexcite her more or does the same thing. So... how could I help this?