Presently they have twice that much space it’s closer to 100‘ x 20‘ however, I am having issues with my dog sharing that space. I think they’re cross contaminating each other with Giardia because they both poop in the same grass. The dog likes to eat the goose poop, the geese like to eat the grass that had dog poop on it, therefore I am considering fencing through the middle dividing the space for the dog half and the geese half.