Last night I participated in EMC's 4th birthday party. A big thanks to staff for putting it together. One of the drop items I received there was a +125% speed horse egg.Today I spawned the egg at my residence in town so I could use it for breeding purposes. I gave the horse some wheat and it instantly grew to full adult size with just one feeding. I then tried to ride the horse in order to place a saddle but it instantly reverted back to its smaller form. Nothing I do to try and tame the horse is successful. It just turns back into a foal again.I have never encountered this before so I am stumped.