2 month old calf that turns around in circles?

I have a 2 month old calf that has walked wobbly in hind quarters since it was born. On windy days this calf's hind quarters wobbled noticeably side to side while walking. If calf decided to it would take off running/playing like nothing was wrong with it.  I thought it may have recieved nerve damage while being born. It was born unassisted/unwitnessed from a cow that's had 7 other calves previously. Yesterday I noticed this calf with its hind quarters moving to the left & frt quarters moving to the right in a kinda circle. Anyone witnessed anything similar or have any ideas? 

Thanks,Jim

2 month old calf that turns around in circles?