I'm not really an animal person and I briefly dated a vet once and it always used to crack me up how when she was telling a story she would refer to the animals as patients. Like I get it, animals are sentient, have emotions, are intelligent, have ways of communicating etc. But there is still something inherently funny about this to me, like a sketch show where you're zoomed in on what you assume are two doctors in white coats with scrubs and stethoscopes talking about a problematic patient and then the camera cuts to the wide shot and you realise the doctors are actually vets and the trouble causing patient is actually a mischievous dog.

Anyway, I bring this up, one because it's funny but two because it highlights how emotionally tough the job is for vets - most people can easily empathise with how hard a surgeon or doctors job must be but can struggle more when it comes to vets. But to these guys these animals are their patients and they feel the same level of responsibility to them that doctors do to humans. It's got to be tough when you have to put so many of them down week after week after week.