I'm green when it comes to minis. I'm picking up my 4 month old mini mare in two weeks. I have a Chevy avalanche pick up.. can I put her in the back seat? Seller has just informed me that she too is green..has not been handed my any human. I'm starting to get concerned.. I have had regular horse's. But they were both adults..bomb proof . I have already paid in full. Please someone help me with..first ..transportation ideas.. second.. what should I expect from her..being so young and green.