Humans have chosen to domesticate animals. Leave nature alone and it is in balance… try and manipulate it, push a certain agenda, oppress it and it falls apart, that natural balance becomes corrupted. Take for example, sheep, they were fine for who knows how long, evolving as they naturally would, then people decided to shear them for their wool, we exploited and oppressed them for our selfish benefit, now they are dependent on people to continue this cycle of exploitation or they can actually suffer and die. They evolved in an unnatural and harmful way because of human interference. Dogs are another great example, all of the inbreeding to produce certain traits and now we have breeds with all sorts of poor evolutionary characteristics. Some of them can hardly breathe, others have legs too short, some are prone to diseases they wouldn't otherwise have.. etc.
Obviously I feel a certain way about this and it's an unpopular opinion. Please stop debating this topic everyone, all we are doing is hijacking the OPs original post and we as a community owe it to them to assist them with their dilemma. The reason I voiced my opinion as I did originally was to help them see things in a different light so they could CTB without some moralistic guilt trip, but it is clear they are very bothered by the decision to put coworkers at risk. I commend the OP for being so considerate of their coworkers, it's refreshing to see someone this empathetic and altruistic. My apologies to the OP, this was never my intention when posting my opinion, sorry your post has taken this odd detour.
I feel like it is clearly not in their best interest to take the pentobarbital that they have access to at this time because of a strong conviction and loyalty to coworkers.