If you happen to come across a sheep lying on its back with its legs up, it is cast. If they are left like this, they will die. If you are able to, turn them up the right way, please, or try to find someone who can. If they have been upside down for a long time, it may take several attempts (or you may need to hold onto them for a bit, while they deflate!) for them to stay upright, without wobbling off and falling over.

(Grass fermenting in its stomach produces gas, and if the sheep is on its back the gas can't escape. As the gas builds up in the sheep's stomach it causes pressure on the lungs, eventually preventing it from breathing causing death).