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  • Fans Jason and his dog Theodore pose for Sunday Mug Shots!

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  • Australia's beloved Koalas placed on endangered list

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  • Couple in Brooklyn ties the knot with a Sunday Mug Shot

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Meet the medical dogs detecting diseases and saving lives

03:21

The 3rd hour of TODAY follows Clay Ronk, a California native with Type 1 diabetes, and his Labrador retriever, Whitley. The pooch — one of a few medical dogs trained to help people living with medical conditions — sniffs out Ronk’s blood sugar highs and lows before they become life-threatening.