I'm moving my horses soon to a yard where they will be in a mixed herd & mine have been just my 2 for a while & I'm adding a 3rd ! Do you have any tips to lessen the stress?

Hello Megan!
My biggest tip to lessen their stress is to introduce them to the new horses through the fence and let them know each other before turning them out fully.
Horses move all the time, and it can be stressful, but I'm sure you will be fine!
Good luck,
Grace