Demand to make it illegal in all US states to euthanize animals using Gas Chambers

It's horrific to see an animal Gased in a chamber. It is cruel and inhumane. These animals are tortured for minutes. Let's make it illegal and put a stop to all gas chambers in every state in the US. Let's fight and put a ban on this. Sadly millions of animals die every year in shelters, but  the process in doing so does not need to be painful. This has to stop!