Many people, when they learn about the horrors of factory farming, become vegetarian or vegan. I’m one of those people, and it stuck — I haven’t eaten meat in 20 years. For most, it doesn’t stick. But new research highlights how ditching meat isn’t the only option to help animals on factory farms. There’s actually one thing that’s almost as effective and probably way easier for most people: eating fewer small animals.  The number of animals who suffer to produce food products — and how much they suffer — varies widely. Bigger animals, like cattle raised for beef, are raised in lower...