Dead is dead. One way is just as good as another.

@Larry: Are you saying that, given a choice, you would see no difference between (let's say) being boiling alive and being given a lethal injection in accordance with death row procedure? I doubt you would choose the former.

Virginia must stop the use of gas chambers to euthanize dogs and cats in our animal control facilities. Using a gas chamber to kill causes suffering of the animal, including ongoing distress and panic during the procedure. The systematic euthanization of thousands of animals each month, simply because they are homeless, is sickening enough. While working toward eliminating kill shelters and promoting animal adoption and spay and neuter programs -- we need our Virginia legislators to ensure that these helpless animals do not suffer further by the inhumane use of gas chambers.

People die from CO gas without even realizing it - so CO gas in and of itself must not be so bad. What is bad is the crude method of producing the CO gas with an internal combustion engine; (1)without the hot exhaust being run through a cooling heat exchanger; (2)not having proper lean fuel mixture to avoid poor combustion's grueling fumes - both are side issues that are controllable and independent of what otherwise would virtually be a painless, sleep-induced death.
Much more so than an alternate method of jamming a needle of violent solution directly into the animal's heart - and NOT IN THE LEAST LIKE the tortuous, lung-scorching cyanide gas used in past human gas chambers for capital punishment.