Foundry do some pigs which look the part and also a Wild Boar set if still in production. Longhorn sheep and Highland Cattle i think are made by Gripping Beast but in cattle something small like the Dexter would perhaps be more fitting to the period. When i excavated on Anglo-Scandanavian sites in Lincoln in the mid 80's cattle,pig, sheep and even goat bones were present in good numbers in the masses of rubbish/midden pits as well as a small number of chicken and geese. Willow fish traps were also present and game in the form of deer bones also made up a small percentage of the animal remains found on the sites as well as larger wild birds bones.