In GBA's "The Story of the Ranch", if you plant grass and release the cattle, do you want to eat grass or cut the grass for the cattle?

If the cow is left outside and it doesn't eat, Niu Niu will get sick overnight, and there will be no milk the next day. Don't let the cows go out when it rains.

Usually I don't want to let the cow out, so I cut it down for it to eat.

Which version are you playing? Some versions of Niu Niu will eat grass outside by themselves, but I don't recommend it.