Mash feed: Animal feed consists of different ingredients to make a balanced diet in terms of protein, carbohydrates, fats, vitamins, minerals and medicines etc. in manufacturing of feed in mash form, there are few ingredients like DORB, rice polish etc. which are already available in the powder form, while some of these like grains, fish, GNE, soya etc. are available in solid form and has to be converted to granular form to particle size suitable for the animal. For this purpose grinding of these ingredients is carried out with the help of grinder or hammer mill. After converting all the ingredients in the powder form, these have to mix in right proportions to get the homogenous feed. Mixers are employed for this purpose. So there are two basic operations of grinding and mixing in feed manufacturing of feed in the mash form. Pellet feed: Pelleting is a process in which mixed feed in powder form is converted into pellets by mechanical compression in combination with moisture and heat. Process is achieved by a set of rolls and die of suitable hole size and shape. As the die & roll rotate, the product passes through the nip of roll & dies and pressed into die holes to make pellets.