My cat has been limping on his hind left leg he hissing aggressively meows when he moves I’m pretty sure he either has a fracture or sprain or dislocation. he is eating an drink and using the bathroom but I can’t afford to take him to the vet for treatment what can I do for him and for his pain?

My wiener dog has been dragging her rear legs. It could be a slipped disc, but I don’t know what to do.