Yep, minis are the most curious things. They are full of mischief.
Last winter, we kept the weaners in the barn. One little guy who has always been smart as a tack found a way to open his stall door. He walked past all the other horses and went down and opened his little girlfriend's stall.
Together they absolutely trashed the barn. They tore open sacks of shavings, pulled hay bales off the stack, opened the treat pail and ate them, tore open feed sacks and made a real mess.
In the morning my hubby yelled and said to come quick. He was so mad at them, he refused to do the clean up. I did the clean up job which took all morning, but I laughed all the time I did it. That little fellow is so clever. We should have named him Houdini.
After that we double locked his stall.