Stop using gas chambbers to euthanize dogs and cats

Please stop using the gas chambers to kill dogs and cats. This is a cruel,barbaric,heartless way to kill animals as evidenced in this video http://www.youtube.com/watch?v=EEk8947DzCI
These gas chamberas are designed for the ease of the shelter workers not for the care and compassion of animals being euthanized.It is a tragedy that any animal ever has to be euthanized at a shelter. At the very least,their last minutes on this earth should be in an environment that is peaceful,nonthreatening,and the person responsible for doing this should be a compassionate,caring animal lover not totally the opposite like the men in that video. No dog or cat should have to die like the dogs in that video did.