Sorry to hear that but I can't get my head round caring for animals yet happily shipping them off to get gassed to death or shot in the head.Thats not fair- my partner is a farmer and the animals are well looked after and are killed in the most humane way possible for food. Farmers are human and killing animals for absolutely no reason is upsetting.
On a tangent but one of the highest rates of suicide amongst degree educated professionals is amongst vets. It's connected to treating animals in pain, difficulty communicating with patients and a large number of your patients being euthanasised.I think they do care.
Think about your daily work - if you would work hard on something and it would then just be binned wouldn't you mind either?
Why dont you think farmers dont care about their animals? Because they are being killed to be eaten? They can still care about them and want them to live as good as possible and for their lives to have had a purpose
Same works in abbatoirs too, I believe. Based on relatives who work in one, there's a strict rotation to make sure individuals don't spend too much time in the killing section. This is in Canada though, I'm not sure if there's similar guidance in the UK.