Thank you for replying everyone. That is what I thought but I've never had more than one dog before and I've never had to go through this, so I just wasn't sure. I had to have my boy put to sleep and I thought having the others see him afterward was the right thing to do so they would know he's not coming back but now I think I've just traumatized one of my girls. She started panting heavily that night and whining and basically not acting like herself. I've decided to take her to the vet tomorrow to make sure she's physically healthy. I've been taking her for more walks and engaging her in more play to keep her mind off of him and that seems to be helping a lot, so I'm sure she'll come out of it. Thanks again for all your help.