How to get more Army of Snow Abilities

As I mentioned in my post Feed Santa's Starving Reindeer you can get the three types of Army of Snow as rewards. But do you know as long as the event still going you still need to feed Santa's Reindeer a day. I completed feeding Santa's Reindeer to 100% I received the 3 types of Army of Snow the next day after that I noticed that the Reindeer status became 99%, so I feed the Santa's Reindeer again and GUESS WHAT?? I received again the 3 types of Army of Snow abilities.

So don't stop feeding Santa's Reindeer to get all types of Army of Snow, Don't forget that this event will end at January 6th, 2010.