Update: I was unfortunately not aware of Shamus Young's severe criticism of Fallout 3 available here to link in the original piece and I regret that. It dovetails rather nicely with what I've written and it's much better executed than my piece. I strongly recommend anyone...
Here's the complete guide on Reindeer Dragon breeding in DragonVale:
Incubation Time: 5 Hours
Buy/Sell: 100 Gems / 100,000 DragonCash
Breeding Combination: Reindeer Dragon is a holiday dragon that has been added with patch 1.3.0 for DragonVale. Make sure your game is up to date before trying to breed a Reindeer Dragon. Combining a Cold Dragon and any hybrid Plant Dragon will yield a Reindeer Dragon. Here's a list of combinations that have successfully bred a Reindeer Dragon:
Willow Dragon + Cold Dragon
Storm Dragon + Seaweed Dragon
Cold Dragon + Moss Dragon
Blue Fire Dragon + Plant Dragon
Cold Dragon + Swamp Dragon
Cold Dragon + Tree Dragon
Poison Dragon + Blue Fire Dragon
Mountain Dragon + Tree Dragon
Remember: In DragonVale, Cold and Plant are opposites, so using a Cold Boost or a Plant Boost will negatively affect the Reindeer Dragon.
Check out the rest of our DragonVale coverage and guides: