i didn't even know any breeders sold them at 5 weeks. i thought 6 was the earliest. i personally think 8 is good. i also have no advice to give other than i doubt a dog can comprehend that your brother took his life and being home at the time has made him mentally unstable. c'mon, they're a smart breed but i have a hard time believing a dog can comprehend that. very sorry for your loss regardless of what i think the dog understands.