Translation:The horse is enjoying eating the green grass.
I agree. It is said properly, and I don't know how clear it would be said when you converse with someone. I think your listener will fill in the gaps when they listen to you. It's just a matter of applying the rules, and that's where I'm still learning. I may have errors on here, but when I am confident enough to chat in Welsh, it may not be so much of a problem.