have you been checking the temps and humidity in the tank ? Just want to make sure those are within the right range. And you need to be careful with leaving crickets in the tank with the frog for too long they are known to actually bite your frog and cause stress. Is the sides and back of the 10gallon covered with paper or background. If not you may want to do that. Check everything to make sure its within the guidelines on the Caresheet : Frog Forum - Pacman and Horned Frogs - Ceratophrys - Care and Breeding if everything checks out fill out the Trouble in the Enclosure post and paste it here and one of the more knowledgeable people should be able to help or give some advice