I used to keep a horse on a yard that wouldn’t allow straw, which suited my horse at the time because he would cough on anything other than dust-free shavings, so that is the bedding I bought him.

We're putting about 150 million to 200 million sperm cells in each individual straw ... worth of semen ready to be used to inseminate mares. Narrator: In the horse-breeding world, genetics ...