Actually, they graze very nicely and make a nice lawn.
They eat the dandelions first... and a few other weeds... then wonderfully trim the grass.
I keep wondering if they remind me of cattle or horses..... because they eat a bit, sit and digest a bit, then repeat. I guess more horses
...
Oh... as to containment.. a proper fence works. Have a goose herder is best... because then the herder can make sure the geese graze fir most if their feed.
The last time I had geese, I would have the kids herd... they herd easily because they insist on staying clumped together. Way more...
Tasty. Kinda like duck? Way more dark meat, and way more juicy than chicken or turkey.
I would not say it was anything like beef. Muscovy breast is a little like beef... but not goose.
The silly things fly LESS, WAY less, than chickens. I am not sure if they can get any height at all...