And did you get another dog afterwards?
18 months ago I gave a rescue dog back after just one month of having them. The rescue I got her from agreed that the fit wasn't right (they didn't spot a few things behaviour wise) and thank goodness she found a new home more suited to her and she settled in wonderfully.
It was such a heartbreaking, awful decision and to be honest a bloody tough month of having her, that I didn't consider another dog again for fear of it happening again.
Has anyone out there had to return a rescue or a puppy and gone on to buy or adopt another dog and have a better outcome?