Notice: Select mold for reference: 2mm: generally, it is used to make pet bird feed such as thrush, parrot, etc. 2.5mm: generally, there are drawings, young birds, young chickens and ducks, young aquatic products and other small animal feed. 3-4mm: generally used to make feeds for chickens, ducks, rabbits, geese, birds, aquatic fish, etc. 5-6mm