Rescue dog with severe seperation anxiety..HELP?

She needs to get over the crate issue. One of the best ways to positive ociate the crate is to feed her in there. Every time. You put her bowl in and only feed her in there. Also toys, treats and a bed to make it her den and safe place. It will take time. Make sure you take her out A LOT to give her opportunity to empty system before crating her(like before you leave, not necessarily every time you feed her) and immediately after when you get home. Crate her at night and always leave the crate door open for her to go in as she pleases.