No, I'm not in favor of either. That doesn't mean I have extreme vitriol for those who are; in all honesty, one lapse of judgment as a teenager, which was most likely well intentioned, does not make someone an animal abuser or a sociopath. By your logic every time you've stepped on a god damn ant you're an abusive shit head. Not to mention, there are glaring inconsistencies in the things you say.
First, you anthropomorphize animals in an attempt to effect pity for them;
Yet you assert the opposite in your reasons not to give psychoactives to animals in the first place, that being that they can't consent nor understand the experience to which you subject them, and more importantly that they don't have the memory to retain the experience. I'm just saying, if animals really can't understand anything about a psychedelic trip or retain it, then they probably can't love their owners, and they probably won't remember the fear induced by a psychedelic experience. Or even fear it, for that matter, if they can't understand anything about it. Granted, you're wrong about all of this, but it's amusing that your arguments are somewhat self defeating when you're so vehement in the first place.
Not to mention a good portion of all the medicine you've used in your life time, all of the medical technology you rely on, is probably the result of a lot of unconsented animal testing, with -gasp- drugs. I also doubt you're a vegetarian, but whatever, you probably don't consider the lives of nameless animals subjected to medical testing and appalling meat industry conditions if they aren't named "spot" and don't live in your house.
I don't think someone should subject their animal to an unconsented drug experience, but I also don't think that anyone that has is inherently evil and should jump off of a cliff. For whatever reason, you have a giant stick up your ass about something concerning which you can't even formulate cohesive arguments. Maybe if you stopped being a giant baby about it to everyone (yeah, I wouldn't consider what you've been spewing in this thread "sarcasm and sass," dude, you're just an angry guy), you could articulate yourself better. Probably not, though.