Cows are only milked once a day. Steak comes from a beef animal. Blue jeans are made out of cotton. Wool can be used to make clothes and blankets. Swine is another word used to talk about sheep.
Leather is made from the hides of cattle and pigs.
The part of the onion plant that we eat is the flower. Wheat is a seed. Bread is mostly made of corn. Flour is ground up wheat. Spaghetti noodles are mostly made of flour.