It may have been the xray that made the bill a bit higher than "normal".
Ellie has had pancreatitis diagnosed by an ultrasound that was being done for something else. So she has had that and now has intestinal issues.
She has done well on 18% fat but this will be way too high for most dogs prone to pancreatitis. Yes, they will have to be fed separately at first and then maybe you can find a food that can be shared.