Transitioning to grass

So over the last week I’ve been leaving my geese outside in their run with lots of lovely grass to eat while I’m at work, ( it’s fresh grass growing from the ground, not clippings) but I have a question; Before I put them to bed for the night I always fill up their tray with pellets to supplement them while I’m away, they go so crazy for this stuff it seems like they’re starving and gobble it down like it’s been their only meal in the day – should I be feeding them more pellets than just once a night?

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