Winter greens

My chooks LOVE greens and have been getting loads as I have been thinning out the veggies for weeks and they get all the tops. They also get moved round the "lawn" ( :blink:??) every few days so have grass as well. Question is....WHAT AM I GOING TO DO IN THE WINTER?
Any suggestions would be gratefully received. :blink:

our hens have ate all the grass in there pens and was thinking of moving there pen to another part of the garden and replanting the grass but im in too minds as to what to do as the pen is about 20ft by 16ft and would it be worth planting it all again for them to have it bear in a week lol

but kate, if i do it for the chickens I would hav to do it for the ducks too as I wouldnt want them upset haha

Mine no longer have any grass/plants as they destroyed the entire lawn and borders in 3 months  They do get the whole of the garden all day long, with just the patio with veg fenced off from them. They have bark and slate to scrabble in and I throw them greens in each day, which they ingnore! I debated putting down a new lawn for them, but that could get very expensive 

I'm thinking through the grass problem at the moment, in anticipation, another 3 weeks till ours arrive.
The real damage to lawns seems to be through scratching and dust baths.  So, I was wondering about growing grass for them in hanging baskets?  That way they could only peck, and not scratch, assuming I can get the height right   It might take some trial and error, but you can adjust height with lengths of chain or even rope.

Necessity is the mother of invention?

Just make sure you post a pic of your hens in their new swinging dust bath!!! 

Thanks for your help, guys! I sowed kale and cabbages today and will get some beet seed too. The things we do to keep the ladies happy, eh?