You need to have a way to send animals back to the barn if you accidentally send them for presentation to the buyer. I thought that the buyer would take the lowest rarity animal, so I grinded the wolfgirl to make sure she would behave while I was raising my foxgirl to love me. Friday rolls around and I make the foxgirl my housepet. I go to sleep and the buyer rolls up. He keeps going "you know why I'm here" without the option to say "I'll go get my wares". I rocket off to the barn, put the finishing touches on my wolfgirl, send her to the buyer...only for the buyer to repeat "you know why I'm here". He wants what I can't give him. I can't sleep, I can't leave my farm. I can't end the frelling day.
Also, either have the ability to move buckets around (so a catgirl bucket doesn't just sit there while the dice favor wolfgirls) or have the girls occupy the first available stall upon capture.
I'm guessing that a future update will allow you to have all four stalls in the stable filled at the same time?