The barn is where the reindeer go for treatment.There are two ways to get a reindeer into the barn. If you would like to take care of a specific reindeer, tap to select and then tap the open barn doors.
If you do not have a specific reindeer in mind, you can just tap the barn doors and you will be taken into the barn with a reindeer.
Once in the barn, you'll need to help Anna diagnose the problem and treat it. Tap the area on the reindeer that has an issue, and then select the correct item to help the reindeer.
Once the reindeer is all better, help pick a decoration that they can wear outside!