Awww... Sounds cute.
I love mini's!
They aren't too different from horses, really. Watch carefully for whiteline disease and VERY carefully for laminitis. Only feed grain when it's really cold out; donks put on fat very easily and may founder. Speaking of cold, some, though not all, get cold easily. May need a blanket if it gets too bad. Also, they're smart little devils; a hundred times smart then a horse. They'll unlock gates, steal food, find their way out of fences, etc. Be careful.