Puggles was a boarhound who lived with Franny. After Franny was captured by Maldor, the dog was taken by conscriptors and made to follow Jason and Rachel. The pair ended up using Puggles to get past the titan crab in the cave next to Jugard's. Puggles was chopped in half by the crab, but Jason and Rachel got away safely.
"Boarhound" was a real-life term for a dog that was bred to hunt boar.