Pictures in this case would help us alot. Does your little frog have any puncture wounds or scratches from the cat? If not, then I am sure your bullfrog will be fine. Froglets will shed constantly, so the slime is not anything to worry about. Again, though, pictures would be helpful to make sure this is normal and not a sign that something is wrong. Be careful with a tank that size: my American bullfrog is only 2 1/2" long and is kept in a 10 gallon for the time being. That way, I can ensure she is finding and eating food and I can monitor her growth and health without having to search forever to find her. Are you gutloading and dusting your crickets with calcium and vitamins on alternate days?