I had a friend who used to to that to her cats all the time. Was funny, but mean.
One time my mom hid her in a shoebox under the bed. Our dog found it and ate it all. She gets 1/2 oz at a time and the bag was more than half full. The dog kinda just lay there panting on her side for a good 5 or 6 hours. I was kinda freaked out at the time. I didn't smoke then and I bugged out on my mom. I thought the dog was gonna die.