Its funny to see my pleco and dwarf frog battle over an alge waffer at dinner time. if the pleco finds it first, the frog will swim over and head butt him and visa versa. i also find this to strange because i like to feed my frogs ( 2 of them ) sinking pellets/ when there is a just a pellet in the tank both frogs will happily munch away but as soon as the waffer is put in its war (bert must really like alge waffers, ernie not so much)