We were fortunate when we moved here, that there was lots of chicken runs in the "orchard" thats the posh name for it! There are two purpose built chicken sheds, one of which is split in half, with a pop hole either side. We need to build new runs for the chooks round this shed. The other shed is split into 2 thirds and one third, the runner ducks live on one side, and the call ducks on the other, and the runner ducks have quite a big run attached, and the call ducks a smaller one. As well as this, the 3 Cayuga's live in a garden shed and free range through our mini paddock and into the goats field if they want. Then we have a littleacre run we bought about 12 years ago, which is big enough for about 3 hens, plus a new coop with attached run we bought just last week which is big enough for 5 hens. Once the chicken runs are built, the movable runs will mostly be used to house ducklings and chicks.
Beth