It is morally okay to slaughter dogs for meat or leather. Non-human animals have no rights whatsoever. The whole "dogs are smart" argument is bullshit. Especially when you take into account that pigs are smarter than dogs yet nobody, except for vegetarians and vegans bats an eye when they are used for meat consumption. Also pigs are sometimes used as pets and pet pig owners literally don't care that other pigs are being eaten.