Wheat, wheat offals, barley, and maize are the main feeds used for poultry mashes and grain mixtures, while meatmeal and meat and bone meal (ranging from 45–60 per cent protein) are the sources of animal protein used. Vegetable protein concentrates are not usually included in poultry mashes. All poultry feeds used are produced in New Zealand except for a proportion of the wheat which is imported from Australia. The systems of feeding employed are dry mash and grain, all-mash, and pellet feeding, the majority of poultry producers purchasing ready-mixed mashes, which are readily available.