However, if your rabbit isn't getting enough exercise or if their diet isn't balanced, their fecal matter will become overpopulated with bacteria which can cause diarrhea or other health problems. Another reason for your rabbit's increased poop production could be due to changes in their environment or lifestyle. If you're noticing that your rabbit is pooping more often than usual, it might be a good idea to check out his/her environment for potential causes such as overcrowding, lack of exercise, or inappropriate food choices (e.g., too many treats).