What is the ruling concerning impurities from sheep and poultry that get on a shepherd's clothes, hands, and body, and he only notices them after some time?

The urine and droppings of sheep and poultry are pure because their meat is permissible to eat. This is the view of the Maliki and Hanbali schools of thought. They cited as evidence that the Prophet, peace and blessings be upon him, ordered the 'Uraniyyin to drink the urine of camels, and he used to pray in sheepfolds. Therefore, ghusl (ritual bath) is not required, nor is changing clothes because of them.