The animals will no more always spawn as adult, but can also spawn as baby or juvenile (in the wild, as manhunter, from quest...).
It's uncommon to meet them, but it happens.
First, I thought to restrict baby spawn for solitary animals, but I think it will not be necessary, it will not happens too often, and maybe it can be fun to meet manhunter babies!
Try then give me your feedback please.
As they are patched manually by XML, mod support will be slow.