That kind of person has no conscience, no feeling for animals, so is unable to feel guilt.
It is very bad in Celia's area. Just the other week one of her friends who runs a cat rescue had been asked to look after a neighbour's cats while they went away on holiday. He happened to spot a hutch in the garden, went to investigate and found a rabbit in it...with no food or bedding and the weather was freezing cold. He sorted the rabbit out and looked after it while they were away. When they returned home he told them that he had also looked after the rabbit and asked why they hadn't mentioned it, their reply was 'Oh, we didn't want to trouble you with it' So they had just gone away to enjoy themselves and left the rabbit to die.
As upsetting as it is, when rescues have no space and homes cannot be found then I think pts has to be accepted as being the kind option, better than to continue living a life of hell or left to die a miserable death. What other choice is there?