New Zealand-based Halter creates AI-powered solar collars that allow farmers to remotely herd cattle using vibrations and audio cues through a smartphone app. The collars create virtual fences, monitor cow health, and use proprietary 'Cowgorithm' technology to guide herds and send distress alerts. Founders Fund is leading a new funding round that would double Halter's valuation to over $2 billion, following deployment across hundreds of farms and hundreds of thousands of animals. This reflects growing investor interest in AI solutions addressing agriculture's labor shortages and aging workforce.