How old again? If they have grass for grazing and are not in a brooder they really don't need much greens supplementation during summer, If i see something marked down and it still looks good I'll get it for a treat but in the winter is when i usually give mine greens from the grocery. romaine sure can't hurt him give as much as you want, it will just make their poop gree as you most likely know. When my geese were goslings and I was brooding them inside after first week I'd hang a romaine head in their brooder and they would peck and eat on it for most of the day.Thank you.My goose eats romaine daily. I won't give spinach anymore. Tried kale, but he won't eat it. Been giving him a small piece of watermelon daily. He eats it down to the rind.Going to try regular swiss chard tomorrow. How often and how much should I feed my 1 Toulouse male? He's very big. We have only been giving him food once daily except grain which he kind of free feeds on daily. And only like about 5 big lea es of the romaine a day.He seems healthy but afraid we aren't giving him enough.