
Hi Sarah,
There is a lot of water (75-80% usually) in moist diets whereas, by definition, dry has this removed. Dogs gaining water from their diet will not need to drink as much as those which have the water content removed or reduced so it's quite normal that she should want to drink less :)
Providing she has access to water at all times, is taking some on and off and there is no obvious signs of particularly strong smelling urine for eg, she should be fine - I hope her other problems are sorted soon.
Regards, Teri