When it comes to microwave puffed pet snacks, the first thing that comes to mind is often pigskin. In fact, cowhide that has been cleaned, degreased, dried, and cut into pieces can also rely on microwave equipment to achieve non fried puffing, making it a promising natural raw material for grinding teeth snacks.
Cowhide, like pigskin, is mainly composed of collagen protein. After pre drying and shaping, an appropriate amount of controllable residual moisture is retained inside, which is the basic condition for microwave puffing. Microwaves have the characteristic of penetrating heating, which does not rely on external heat sources to slowly conduct heat. The energy directly acts on the water molecules inside the leather, causing the water to quickly vaporize and form steam pressure inside the dense protein tissue, stretching the fiber structure and forming a loose and porous state. The entire process does not require the addition of oil and belongs to pure physical puffing.
The traditional frying process for making leather snacks not only has high oil costs and heavy oil content, but is also prone to oxidation and cracking during storage. It is also prone to the situation where the outside is burnt while the inside remains tight. If only a regular oven is used for baking, the heating will be slow, the cowhide fibers will shrink severely, the finished product will be hard, and the palatability will be limited. Microwave treatment involves synchronous heating both inside and outside, with fast expansion speed, uniform swelling of the finished product, fine pores, and no localized burning. During puffing, sterilization can also be completed simultaneously, reducing the risk of spoilage caused by microorganisms in the raw materials and facilitating long-term storage.
There is a significant difference between puffed cowhide and dry hard leather. The originally tight and tough cowhide chunks become light and crispy after microwave puffing, retaining collagen nutrition while changing the hard and difficult to chew texture. For pets, a loose structure is easier to chew and has a smaller digestive burden; At the same time, it also retains the toughness suitable for grinding teeth, meeting the needs of dogs for biting and cleaning teeth.
Without the need for deep frying or additional additives, relying on the internal expansion method of microwave, cowhide can also be made into clean and safe pet snacks, providing a unique approach to pet food processing that differs from traditional techniques.
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