Some baby heads are big

Verification builds: 1.11.0.4

Impact: Baby hamsters have too big heads. Players might think it's an error on our part, which it's not.

Repro Steps:

1. Load Pet Shop map in 1.11.0.4
2. Set gamemode to creative.
3. Spawn a baby hamster.

Observed Results:

The baby hamster has a big head.

Expected Results:

The baby hamster should have a smaller head.

Screenshots/Videos attached: Yes

Notes:

Baby heads bugged (penguin, hamster, ferret and possibly more). is_baby component is intentionally missing to prevent big heads (perhaps it's hardcoded now)