Oh, I'm so sorry you have been going through so much, when all you were trying to do was help! Thank you to you & your husband for taking in this poor momma dog and loving her! And her babies! I'm sorry I don't have any medical tips for you--I've heard of something called pyometra, but surely that would have been the first thing your vet would have thought of.....Do you have to go through the shelter vet, or could you take her somewhere else for a 2nd opinion? Please keep us posted how poor Babe is doing.....She is a lucky girl to have found her way to you!