Do you have your dogs on Nothing in Life is Free? That would be a good place to start for all dogs in your household. Since Dino is the new guy, I would make sure he gets extra crate time and would work the chi where he can see Dino. I would not let Dino correct the chi--that is your job. I would also keep them separate 100% of the time in the house and consult a good trainer/behaviorist to help you work out a plan.
I know that some of the posts on here sounded harsh but I personally have known of several gsds that killed small dogs in an instant and I think people are just looking out for your chi. Keep them separate in the house, bring in a trainer who can help you understand the dynamics and come up with a plan and hopefully one day they can all live together harmoniously. If not, crate and rotate is something that many people have to live with.
Ruth & the 4 Legged Rescue Gang
Rafi the malaroo
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Gio & Varda, the krazy kittens
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