I first heard and came across this fuckery about 4 or 5 years ago because someone I knew would take their dogs Tramadol. Back then I thought it was weird and also thought that type of activity was that of a junkie. In my personal opinion when your injuring you pooch just so you can score a fix you have officially have entered a new low in your life, please reevaluate your current situation and seek some sort of help for your problems.
source:cbs12.com