My dog keeps getting sick from eating gross things, I don't know how to stop her?

Give her a job to do to keep her busy. She's probably ''hunting'' and eating things out of boredom. The more mental and physical stimulation she gets, the less likely she'll have the energy or time to get into the stuff she shouldn't. Border Collies can run and herd ALLLLL DAY, so these dogs have tons of energy and need exercises that keep them engaged, interested, and satisfied. Just because the dogs have so much land to explore doesn't mean that's enough to make them all happy. A yard, no matter what the size, simply becomes a giant kennel after a while....so it's normal for some dogs to become extremely bored and find other ways to entertain themselves.