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MrWhistles is really the authority on dog training, but the general method is positive reinforcement. Your dog jumps, you shout "ah-ah", clap loudly, or even bang two pan lids together. They sit down, you give them a treat. You can also simply walk them to the cage on a lead, and when they don't jump, reinforce the good behaviour with a treat. I like to begin training like this on a lead so as when the dog jumps, not only can you reinforce the bad behaviour with a noise, but prevent them from getting the gratification from it by walking them away.
I'm not a big fan of spray bottles for little things like this and personally reserve them for very serious situations like extreme aggressive behaviour, though I'm certainly not saying it's wrong to use them or criticising those who do.
I think ruling out a carnivore/predatory animal as one that wouldn't hurt another living being is being a little close minded. My dog was a rescue who had been badly treated by owners, and had to have a surgery because of how viscously his brother attacked him. He was an absolute angel with me, and with training he was also exceptionally well behaved around my small animals cages. He even stopped getting on edge and defensive around other dogs eventually. Then one day, I'm out walking him, and for no apparent reason he was growling, snapping, raising his hackles and lunging at a tiny little highland terrier. Luckily no one was hurt, but still, dogs are capable of inflicting harm whether or not they show a consistent desire to.