22-1/2" x 14-3/4" x 5-3/8" h is my 32qt tub.

As for the feeding strikes, it depends. If it is a baby BP who is off feed, I would offer live if it wouldn't take f/t. If it is an adult that is fasting for seasonal or breeding reasons, I wouldn't change to live just because of that if I know they eat f/t when they are not fasting.