I have noticed some adoption agencies have weird rules that I don't really agree with. I tried to adopt a cat when I was 19 almost 20. Well I went to an adoption place near my apt in Philly and they turned me away saying I had to be 21, instead of giving me an animal that they would have just put to sleep they told me to go to another agency that did give animals to people under 21. It made no sense. I did go and get a cat from the other place and gave him a wonderful home.
There are soo many animals that need homes and medical attention that these agencies should not be that picky. Yes make sure the home is good and the new owner can afford to care for the pet but it sounds like in this case a personal belief is preventing a dog from having and otherwise loving home