Oh no. I didn't expect to read this. Your Loki always reminded me of what my RB Sake looked like.

It definately sounds like his prey insticts just kicked in. Its a risk everyone, including me, takes with owning dogs & cats. The only advise I can offer is to keep Mocha & Duke permanently seperated. I'm not saying Duke would definately attack Mocha, but I don't want you and your family to have to go through another heartbreak.

Major ((((hugs)))) and good vibes headed your way for you & your family. I hope nothing else happens.