CHARLOTTESVILLE, Va. (CBS19 NEWS) -- Carl, a puppy being trained by Service Dogs of Virginia, is now six months old now and a lot has changed in the past few months, most notably, his size.

"They start to look like they know more than they should," said Linda Farina with Service Dogs of Virginia. "He's going to look bigger and like he should be able to do more, but he's still just a baby."

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