I think so but don't over due it
the best treats are the very dark leafy veges at the grocery store till your garden veges come in
If they eat it it is okay
They should like the sweet taste of it
Don't buy head lettuce as it is watery and waste of money on chickens no calories
use spinach, swiss chard, kale, collards
and you can take a head of cabbage and wrap in a piece of chicken wire and hang from ceiling
they will eat at it and enjoy the work and cabbage