Grammar check for 8-year-old: Snow doesn't melt on bison's fur

Here's a friendly grammar check for your sentence.

Original: Snow doesn't melt on bison's fur.

Clearer correction: Snow doesn't melt on a bison's fur.

Why this is correct (step by step for an 8-year-old):

1. The sentence means the snow stays on the bison's fur instead of turning into water right away.
2. We use doesn't (short for "does not") because the subject is singular: one bison. If you mean all bison in general, you could also say, "Snow doesn't melt on bison fur."
3. Adding the little word a before "bison's fur" makes it clear you're talking about one bison's fur: "a bison's fur." Both versions are grammatically okay, but adding "a" sounds a bit clearer.
4. The apostrophe in bison's shows that the fur belongs to the bison (it's the possessive form).

Final simple sentence to use: Snow doesn't melt on a bison's fur.