Vishnu assumed this form to kill the demon Hiranyaksha, and Brokk and Eitri created one from gold for Frey.  
One of these creatures gave birth to a grain of wheat and a bee, a grain of barley and a bee, a wolf, an eagle, and Palug's Cat. Lleuelys advised Llud on using a vat of mead and a sheet of silk to capture two dragons in this form, and Math battled Pryderi for some of these animals. One immortal took this form after being banished for flirting with the moon goddess Chang-O, and later became a guardian of the monk Xuanzong.  Vishnu assumed this form to kill the demon Hiranyaksha, and Brokk and Eitri created one from gold for Frey.  Henwen, Zhu Bajie ["joo ba-jyeh"], Varaha and Gullinbursti are all examples of, FTP, these animals, one of which was killed by Meleager during a hunt in Calydon.
One of these creatures gave birth to a grain of wheat and a bee, a grain of barley and a bee, a wolf, an eagle, and Palug's Cat.
pigs or swine or hogs or sows or boars etc. (technically boars are ruled out by the first clue and sows are ruled out by the second, but I think it's best to be lenient here)