It would be cool if there were different types of manes. Think of a nicheling with the mane of a lion! Here are my ideas:
Small mane: Just few tufts of hair on the head
+1 attractiveness
Medium mane: The current mane
+1 cold resistance
Big mane: The mane of a lion
+2 cold resistance
-1 heat resistance
+2 attractiveness
Tuft mane: Like medium mane exept this comes with ear tufts and if you have medium tail, it gets a tail-tip-tuft and double effec