The Iron Age agricultural structure was more based on animal husbandry than the growing of crops. The Iron Age farmers of what was to become Sweden kept several types of animals. The two most importanr ones were cows and sheep. From the cow they could get several products, obviously milk, which was mainly not for drinking but for making butter, cheese and other dairy products. The cow also was a source of meat and furthermore people could use the hide for making leather products likle shoes, pouches, belts etc. The cow´s horns were used as drinking vessels. Finally, also the manure was important. Of course it was spread on the fields as a fertilizer, but it could also be applied on the inside of house walls as a type of insulation material. Finally, in its dry form, people used it as fuel. Due to colder and moister weather conditions during the Pre-Roman Iron Age (500 B.C.–0), farmers of Scandinavia had to keep animals indoors during the winter. This led to a more intense collection of manure, which was used as fertilizer. Thus also cultivation was intensified. From the sheep, people got wool for making clothes as well as meat. From sheeps´ milk you can make wonderful cheese. Also the hoofs could be used for making glue, the bones for making flutes and combs and the brain of the sheep was used for tanning leather. Other complementary animals were goats, kept mainly for milk and meat, and pigs. Pigs are fairly cheap to raise since they can be fed with kitchen waste and tend to find food more or less whereever thay are. During the Iron Age, after 500/600 AD there is a rise in pig husbandry, in particular in richer settlements in southern Scandinavia. The horse during the Iron Age was very similar to the modern Icelandic one. It was used mainly for riding and pulling waggons. The horse was also a holy animal in Scandinavian religion. Therefore, you seldomly find horse bones on settlement sites. Instead, horse bones are found on sacrificial sites where the horse meat was cooked and shared in a sacrificial meal. The horses head and hoofs were sacrificed to the gods. Fairly new animals during the Iron Age were geese hens and cats. All three of them became part of Scandinavian farming cultures during the first centuries AD. This probably had to do with Scandinavian contacts with the Roman Empire Of course people also kept dogs, which is our oldest pet, or even companion through the ages. New DNA-evidence show that the dog has followed man for tens of thousands of years.