The frog is weird. The subtitle says "frog eats", but in the game the frog uses its tongue to catch a slime or magma cube and immediately (without any delay) frog spits out the slimeball or froglight without closing its mouth. Frog only touches slime or magma cube. That's not eating.
Proposition: subtitle can be changed to "frog catches food" or there can be a delay between catching the food and spitting slimeball/froglight.