A badly burned dog's paws are 90% healed, four weeks after veterinarian Boyd Wagner injected embryonic stem cells into the pads in an experimental procedure aimed at spurring new tissue growth. "I would have thought we'd get a lot of granulation tissue, a lot of scar tissue being deposited and he'd have real deformed feet and pads. What we're seeing right now is pads are being formed almost like they were originally," Dr. Wagner said.

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