Cattle, as individuals or as a herd, possess many unique traits, the most distinctive being their social disposition. They are extremely social animals and rely heavily on "safety in numbers"— herds can form with up to 300 animals. Each animal can recognize more than 100 individuals and will closely bond to some herd members, while carefully avoiding others. While the bond between mothers and daughters is particularly strong, calves also maintain lifelong friendships.
Despite their reputation, pigs have many positive attributes including cleanliness, intelligence and a social nature. Pigs are indeed clean animals. Yes, they do roll in mud, but only because they can't sweat like people do; the mud (or water) actually keeps them cool. If available, pigs, who are excellent swimmers, prefer water to mud. Pigs also carefully keep their sleeping area clean, and will designate a spot as far from this area as possible for waste.
The horse is an odd-toed ungulate mammal belonging to the taxonomic family Equidae. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature into the large, single-toed animal of today. Humans began to domesticate horses around 4000 BC, and their domestication is believed to have been widespread by 3000 BC. Horses in the subspecies caballus are domesticated, although some domesticated populations live in the wild as feral horses.