First congrats on yer new bestest buddy
I cannot recommend strongly enough going with a RAW diet for your new bestest buddy. It is all I feed my Malinois. Our old girl Alex(RIP) was 10'ish and sliding down the slope pretty fast. We switched her to RAW and it was like flipping a switch. She took weight off, began behaving like she was 7'ish. She lived to be just a bit over 16. RAW ia all our boys have ever been fed. When we got our new gal DJ last year she was returned to the breeder by her former owner because her Vet said she had hereditary gastro digestional problems. Given I know both the sire and dam, I heard this and laughed out loud, the idiot Vet had placed her on Corticlesteriods at 9 weeks until we got her at 12 weeks. The breeder got her back and we took her switched her to RAW and all digestive and gastro problems disappeared overnight. She has the constitution of a tank now she could eat one too and not even flinch. Most vets will discourage RAW, because it poses sanitation issues when you handle a lot of raw meats adn bones. I test my dogs blood panels and organ functions yearly and they are spot on. You are right for some reason black and tan dogs (Rotties, Dobies, Beaucy's.. seem to have a high incidence of bone cancers and immuno problems.) Our Mali breeder si a big fan of Rotties, he has a female who can do the work and just charm you into adoring her. She has the most positive personality I've ever encountered in a dog, no environmental sensitivities at all.