Apparently birds like it too. I found this:
"It is absolutely 100% safe. I am an avid aviculturist with over 11 years of experience. I have rescued, fostered, and owned almost every bird you can imagine. I have PTSD and smoke marijuana everyday, with my birds beside me. My pineapple conure often steals buds from me and I actually have a tattoo of her holding a marijuana flower on my arm. (I have a sleeve of all 7 of my babies) Hemp seeds are found in bird foods/ seed mixes and most vertebrates have an endocannabinoid system which produce cannabinoids naturally when the animal feels stress of some kind. I have sat through lectures on this. I am a Zoology major, with a focus in Avian Science. I have also worked, and studied, as a vet tech. I would not steer you wrong, birds are my life. 110% positive! They've eaten the flowers, the stems, the seeds, and been near the smoke. And I would NEVER allow someone to smoke a cigarette even in the same house with them.
*edit: when I say I smoke near them, I mean in the same room. Never blow anything into a birds face. (Not that you would, just saying!)"