I was watching animal planet the other day and they had a rescue that talked about a system they'd put into use to help reduce their return rate. They had a three colour code system for very active dogs, moderate dogs and sit around type dogs. Before people saw the dogs they discussed what sort of dog was write for them and gave them a colour and then they could see which dogs they were potential matches for. I guess it stopped people picking a dog that was cute/had a sad story and thinking oh I'm sure we can fit it in when really they weren't a good match.
Tam