This is a tough one and there is no right or wrong, just beliefs and opinions.
I am an animal lover, always have been and always will be. That's the way I brought up. I've had pet fish, birds, mice, hamsters, rats, GP's and now bunsters, as well as dogs all my life.
I don't agree with testing. I really don't and some of the things I've seen in documentaries about it are devastating.
HOWEVER, my grandma (my mum's mum) died 3 years ago from Alzheimer's. She had it for 13 odd years and spent the last two or three years of her life as a vegetable.
I don't really remember her to be honest, because I didn't see her after about the age of 9 as she went from nursing home, to mental home, etc and my mum didn't want me to see her like that. As I got older I chose not to see her because I wanted to remember her how she used to be: a dignified, caring woman who worked with the red cross doing various charity work all the time and who completely doted on her two dogs and always fed the foxes at the bottom of her garden.
But I did see what it did to my mum, who was an only child and visited her mum for hours each week on her own whilst my dad was at work and her dad couldn't be bothered, having a new woman in his life, and in fact, in the family home with my grandma's dogs. And even now she'll sit in tears.
And I know for a fact, that she'd give anything to have her mum back and would have readily tried any medication regardless of how many animals would have suffered if it meant she'd have her mum back... and I'm sorry, but if history repeated itself and the same happened to my mum (heaven forbid) I wouldn't care what it took, as long as they could keep my mum on earth. Fluffy bunsters or no fluffy bunsters, I'd try it.