Question About Increasing Happiness

I got a horse yesterday (I believe) that was at 35% happiness in the rescue. She was too pretty not to "save".

Anyway, she is only at 70% and that's feeding her hay. Is there anything else I can do to increase her happiness faster, or will it just take a while?

I think it just takes a while, it'll probably be 100% either tomorrow or the day after that

Happiness will increase 5% for watering her, 5% for feeding her, 5% for mucking the stall, and 5% for grooming her. Bagged/bunched treats increase her happiness by 10%, single treats increase by 5%. After a day or two of caring for her she'll be back to 100% :)

Thanks! That gave me incentive to rescue a few more like that today.

(Does this mean they would "die" if they're not adopted when they're put in the rescue? Yes, I know they're just pixels, I am just curious.)

Yes; all rescue center horses "die" after 5 days in the Rescue Center.