Description:

While adult frogs are typically carnivorous, tadpoles are typically herbivorous and feed on algae.  However, Minecraft tadpoles can be fed slimeballs, the remains of an animal.

<https://en.wikipedia.org/wiki/Frog#Tadpoles>

What I expected to happen:
Tadpoles would not accept a player's offering of a slimeball.  Perhaps they would instead accept kelp, which is made of algae.

What actually happened:
Tadpoles will eat slimeballs when a player offers them.  It also speeds up their growth.

Steps to Reproduce:

1. Switch into creative mode, and spawn a tadpole.
2. Give oneself several slimeballs, and switch to Survival Mode.
3. Right-click on the tadpole while holding the slimeballs.

The tadpole will proceed to consume the slimeballs.  Green particles do not appear (perhaps another bug), but the stack of slimeballs in one's inventory will slowly disappear.  Eventually, the tadpole will grow into a frog.

Screenshots:

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