I had an african bullfrog (pixie frog) when I was a teenager. Was told they get as big around as basketballs. Mine never got that big. Swallowed a piece of gravel ( the How to keep horned frogs book I got told me to use gravel, found out later that was wrong! ) He ate pinkies and meal worms as a baby then on to full size mice. Would sit there half buried in the gravel and wait untill the mouse walked in front then BAM! Dead very quick. Have 3 "teeth" on the lower jaw and the top jaw is 1 long thin "blade" all around that is angled back so if you pull it digs in.