The winter helper pets have recently been spotted sporting new hairstyles. Both are looking a lot hairier than their former selves (which you can view here: old Father Winter's Helper and old Winter's Little Helper). This change was apparently snuck in with the other undocumented changes in patch 3.2.
The new Father Winter's Helper has grown quite a bit of facial hair, including some sweet sideburns. Winter's Little Helper now has a long, luscious pony tail. Lookin' good, girl! Note how she demonstrates that it is possible to wear a winter hat and have good hair. So how come I still have a butch cut while wearing mine?