Mine was quick. Although, I was more focused on the fact that he wasn't taking to food well... since well [tl;dr: I got him from an acquaintance who owed me like $300 and couldn't pay me back. I ended up paying the difference and ended up with him @ six weeks and unbeknownst to either of us... that particular breed should not be away from its mother until ~12 weeks... This is prolly why he didn't really take to food right away]. I'd say less than a week. I was cutting his hair within the first month, so... I'd say I had gained some degree of trust.