...well-being? Is god a sadist? Plants have incompletely developed central nervous systems, meaning that they just like a zygote don't really feel pain how we know it to be. I could never hurt an animal. 
ez read this, fish do feel pain all animals feel pain
http://news.bbc.co.uk/2/hi/sci/tech/2983045.stm
ez read this, fish do feel pain all animals feel pain
http://news.bbc.co.uk/2/hi/sci/tech/2983045.stm