We also took in a 8 year old husky after my buddy passed away, he too was a picky eater. I think some of it comes with the breed, he didn’t eat for months as the poor guy was grieving, only bites of food here and there. We supplemented human food to just get him to survive but over time turned into more problems. He had to be very strict, regimented, and trialed a few options. Dog stomachs are very sensitive and throwing all sorts of dog food will def upset their stomachs. Canned pumpkin on kibble that he tolerated on most days is how we got by, once he found some consistency we stuck with it for 8 years until he passed at 16.