Thanks Marie, and thanks to Siameseifuplz and LolaCat for your advice
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I think my husband is looking at other dogs again so we will most likely be trying again. This time we are armed with experience into the dog adoption process and will make sure we ask all the right questions. We will also try to work with a rescue that takes a little more time in making sure the fit is perfect on both sides. I was surprised with the process for Kaya... I had been looking at her adoption page for a month when I finally decided to ask for more info, then we went to meet her and the foster home asked if we wanted to take her right then and there - no adoption application, 24-hour waiting, or vet reference - just struck me as odd.