(KGW-TV) As opinions and laws about marijuana change, an unanticipated side effect is popping up: Dogs are getting sick from eating it.

The percentage of pet toxicity cases involving marijuana has been increasing in recent years, according to DoveLewis Animal Hospital. In 2011, less than 12 percent of toxicity cases were the result of dogs eating pot; by the end of last year that number jumped to 20 percent.

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