Now for the bad news. One of the horses isn't doing so great. While the other horses were hitching, hunting and snicking, this one was just laying on the bottom and gilling pretty hard.
I called the breeder, she said "Not good". She advised me to put an airstone near him and try to nudge him up to a hitch.
Well, I adde the airstone and nudged him, but only succeded in freaking him out. He swam around the tank and went right back to where he started.
The addition of the airstone seems to have helped a little, he isn't laying flat anymore.
Also, I find it very interesting that the other horses seem to be concerned and are around him. Maybe things will be better in the morning. I hope so.
The breeder also stated that sometimes there will be one that for some reason just does't make the trip. Maybe this one will.
Any other suggestion? Or should I just leave him be for now?
First pic before airstone, second pic after.