Pigs are among the most intelligent animals and have an exceptional capacity for learning. Since pigs cannot sweat, they like to take mud baths on hot days in order to cool down. As social beings, they live in larger groups. A sow will only go into seclusion shortly before giving birth and build a nest. She suckles her piglets for some 15 weeks – if left in peace. However, the majority of pigs suffer under intensive farming.