I had a litter of kenyans together for a while...I forget their age, but one day I went in there to check on them and noticed one looked odd.
By odd I mean that it "lumpy" for lack of a better word. I picked it up to look it over and when I turned it to look at its belly I found my answer...It had eaten one of its siblings...Its belly was stretched so thin I could see the pattern of the eaten kenyan.
I took pics of it, but the camera I had at the time sucked so the pics didn't turn out was well as I'd have liked, but I had visible proof that they could consume a meal at least their own size...if memory serves the kenyan was able to survive its huge meal.