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This $2 billion AI startup just replaced every fence on a farm with a smartphone app. Meet Halter, a New Zealand company that built an AI-powered collar for cows. The collar uses GPS, sound, and vibration to create virtual fences. No posts, no wire, no posts, just draw a boundary on your phone and the cows stay inside it. When a cow walks toward the edge, she hears a soft beep. If she ignores it, a gentle vibration kicks in. If she still pushes through, a tiny electric pulse. Within a week, most cows learn to turn back at just the sound. But that's just the hardware. The real brain is the algorithm. Cowgorithm, an AI trained on 7 billion hours of cattle behavior. It tracks every animal, detects illness before symptoms show, monitors fertility, and tells farmers exactly how much grass each cow is eating. Halter just raised $220 million dollars at a two billion dollar valuation with over a million collars deployed across three continents at just $5 per cow. AI isn't just disrupting tech and finance anymore. It's coming for the oldest industry on earth.