Hello and thank you for requesting me. Though dogs usually live in the moment if you feel stressed about or are questioning it I would say it is the wrong move.. The dog will pick up on your stress and may become stressed. They do not really understand time but if you are going to the shelter to visit that might make him think he is going home with you. If he were already settled in with the new family and you were visiting him there then it would not be so bad because the environment is totally different.