Timothy hay as in the dry hay you buy in rabbit shops? How do you feed it to them? Just cut them up and put them in?

I just got my pair of uros and they are loving the salad greens. In fact they ignored the small amount of fruit and some soaked mazuri tortoise and just ate the greens.

Should I actually offer the seeds to them? Or is it better if they like the greens to only offer that so they will stay on them?