Hay Mixing hay?

It really doesn't matter. As long as they get unlimited grass hay, you can mix it with other grass hay.

Sometimes it does matter, to the pigs anyway. Some may like one type of hay more than another, especially if you have a pig who may not eat much hay. It could be that the pig doesn't like that particular type or brand. It always does good to experiment with different types of grass hays to see what your pigs like.

Yes, I have noticed that they prefer the orchard grass to timothy, but I will try adding something else in to make life interesting!

When I'm switching hay types, I mix the last bit of the old hay, and some of the new stuff together. I find that it helps them make that transition a little easier.

My girls xhange all the time. They love orchard grass for awhile, then they seem to get sick of that, then they just devour Timothy. So I usually stock up on orchard and Timothy.