Penny-
Check out balanceit.com and/or petdiets.com. You can either request or formulate balanced recipes on these sites. They are run by vets who have specialized in nutrition.
As Aimee stated, struvite crystals in dogs frequently are caused by urinary tract infections. Has this dog been on antibiotics to rid her of infection? Typically, they are not food related. Making sure she gets plenty of water in her diet and opportunities to go potty are both important.
I have a cat that had a complete blockage due to Struvite crystals. I feed him Royal Canin Calm Rx kibble with a variety of regular canned food. He spent a couple of days in emergency clinic, but has been clear for a few years now! Apparently, male cats are very suseptible, but isn’t usually due to an infection.
Good luck, I really hope you can find a way to take this pup in! What kind of dog is she?
