well,if one walks up to you and wags it tail,etc,then that might be the one! and oyu have to like the dog too.When we got Kodie,we were kind of "fostering" him,like he stayed with us for a week to see how he fits in,and obviously he fitted in great! do you know if they do that at your shelters??

you shouldnt be scared to get another dog. And if you dont find one the first time then go back every week or so to see if they have new dogs in.which,most likely they will.
Its your choice