If your dog is crying in the crate, it could be due to a number of reasons. It may be separation anxiety or it could have to go to the bathroom. And it might just be trying to get you to let it out. So, if the crying stops after a short period of time, it may be a test and you’re likely best to ignore it.
For dogs who are crying consistently, you likely need to start the crate training over from the beginning. And if it seems your rescue dog is crying due to a behavioral issue or extreme separation anxiety, you might want to reach out to a professional for help.