Thanks, Santa - I shall make sure the postman is protected from the local dragon. It's a bit of a hazard at this time of year, when the flames from the dragon's digestive system are more powerful than the summer.
As to your idea about working with the dragons and thus disposing of your surplus reindeer, all I can say is that you'd probably better get really fluent with your Welsh.   They're fussier than the Welsh Language Board about mutations and suchlike and the slightest mistake can result in a nasty burn.
I'll let you know on the appropriate thread when the package arrives!