One of the lab workers I know who works the most with mice is more of the squeamish type and is a vegetarian, so I think she'd be more upset if she saw the mice

One of the lab workers I know who works the most with mice is more of the squeamish type and is a vegetarian, so I think she'd be more upset if she saw the mice were in distress - and she's explained the entire process to me. It's also interesting they use the CO2 only on the adult mice, for the babies they simply cut their heads off with shears. She explained the babies are the ones that suffer when exposed to CO2, whereas the adults don't. The thing is it's all a matter of trust. Do we trust the meat industry when they tell us the animals aren't suffering? We've been lied to so many times by corporations that we tend to no longer trust them without some evidence. When they pay off legislatures to pass laws making it illegal to collect any evidence it makes it appear they're lying.