Here's how it would work: First, the company would harvest cells from livestock that would normally be killed for meat or leather, potentially including exotic animals. The extracted cells could be genetically modified for improved leather qualities (but meat cells would not). These pioneer cells would multiply in a bioreactor, and would then be purified and fused together. There are several potential methods to do this, including 3-D printing or scaffold seeding. Finally, the cells would be allowed to mature, stimulating collagen production in leather cells and muscle growth in meat cells. You can read more about their process over at Txchnologist.