6-year-old: Fixing the sentence about a kiang’s hooves — simple grammar and explanation

Original sentence:

The kiang’s hooves look like a horse’s but wider. They help the kiang not slip on rocks.

Corrected sentence (simple):

Kiang hooves look like a horse's hooves, but they are wider. They help the kiang keep from slipping on rocks.

Why we changed it — step by step for a 6-year-old:

1. We add the words "they are" (or just "are") to say that the hooves are wider. Without those words the sentence sounds unfinished.
2. We say "horse's hooves" to show we mean the hooves that belong to a horse.
3. Instead of "not slip," we say "keep from slipping" (or "don't slip") because it sounds more natural in English.

Even shorter version you can say: Kiang hooves are wider than horse hooves. That helps them not slip on rocks.