"Kucing ini makan apa?"

Translation: What does this cat eat?

[Indofreezer]

Why is my answer "What is this cat eating?" wrong?

[1CN5ijzC]

your answer are correct too, since indonesian doesn't have tense.

Note that to emphasize the continuous tense, in indonesian we could use the word "sedang"

Kucing ini sedang makan apa?

[BranchVinc]

Depens on what you feed him/her

[WayangOrang]

Kucing ini makan tikus.

[Jan850798]

This cat is eating what? should be accepted!