Talk to the trainer between now and the next class, see if that woman is normally like that. If she is, ask if there is a different class in which you and Nebo can participate without the hassle. Nebo's no dummy, he'll pick up on you being unhappy, and agility is supposed to be fun! If she's not teaching another class, try one more time, and if the woman is just as mean, make it your last time. It's not worth the emotional toll.