Here is a fully automatic leather and beef farm. You will need 10 cows and wheat to breed and grow the cows. The full grown cows stand on the open trap doors. when their timer is up for breeding the deployer feeds the cow wheat, the baby cow drops below is first blown then pulled by the belt to the place where they are feed then killed when matured with the crushing wheels. The beef and leather is collected in the double chest on top.

The input is 64 rpm, wheat it put in the upper barrel with the brass funnel. I would suggest to place blocks in all but three slots of the cow breeding deployer barrels, this way majority of the wheat goes to growing the baby cows.

The is a 11 wide, 23 long and 7 tall build uses 14107su and produces ~120 beef and ~60 leather an hour

See "Leather & Beef Farm with Wheat Farm" for additional wheat farm