Okay, this could be normal, but it concerns me. I fed Drogo on Saturday, so 4 days ago. When I got home from work I checked his tank and found a large brown turd. Last time he didn't 'do his business' until after 2 feedings and they were 2 small pellets, that looked almost encased. This looks like a small dog turd. I tried uploading a picture- but it's not working.

If any of you have any experience with this or knowledge on the subject I would really appreciate it! Thanks.