SEATTLE - It could be said that Jack, an 11-year-old black Lab mix, has learned to say no to drugs.

"He was just... stoned," said owner Jen Nestor Waddell.

Jack ran off the main trail during a visit May 12 to Seward Park on the southeast end of Lake Washington, said Nestor Waddell, but he came back in about 3 minutes.

About 3 hours later at home, Jack started exhibiting, well, strange symptoms.

"His eyes were kind of glossed over, very out of touch, I mean, he didn't seem to recognize me at first," Nestor Waddell said. "When he was trying to walk, he was looking at his paw, and then looking at the ground and then trying to get his paw to reach the ground, but was unsuccessful."

Concern for Jack turned to relief when she heard the vet's diagnosis: Jack had swallowed a large amount of dried, harvested marijuana.

Some medication to induce vomiting, charcoal to absorb the chemicals, and a night of rest had Jack back to normal.

Jack found pot stashed in the bushes.

"I don't want this to happen to anyone else's dog, because it's scary and expensive - or a child? - so we did call the police," said Nestor Waddell, who joked: "I was going to tell the cops that they could borrow him, if they pay my vet bill, to find the marijuana, but they weren't that into chatting with me about it."

That vet bill, they said, also turned out to be a $1,500 lesson in keeping their dog on-leash while walking in the park, something they say they plan to do from now on.