Add some water to the food.
And/or syringe some water in periodically.
I've been doing that. I am concerned with her electrolytes, though. Would she get enough with water alone?
I do the same as tuxedo mom except I use chicken bones. I skim off excess fat and freeze the broth in ice cube trays and use as needed. Sheba used to get dehydrated but since I started using the broth she has been fine.
In reading your helpful post on testing ketones in urine , if ketones are found, what do I do next?You can test for dehydration at home. See my signature link Secondary Monitoring Tools for the skin test and the gum test.
Commercial bone broth is usually too high in salt. Home made has no saltGood suggestions. What about baby food? Or a commercially available bone broth without onion and garlic?