Mouths are often different sizes as well. Boss has the smallest mouth so he gets 2-3mm. Kong gets 3mm. Tango can scoff up to 5-6mm. its one of the reasons I keep different size pellet mixes.Wow...they actually can open and close their mouths?? And not only that, but they can eat and swim and move around and stuff???!!!
That's incredible! They almost sound like real live animals!
Maybe those breeders are onto something here...