[Anonymous]

“I believe she is drinking plenty. How do I know how much she needs”?

I thought you were asking about the fish oil. As long as you observe the dog going to the water dish occasionally, and there is some moisture in the food, it’s probably okay.
I have a dog that never went to the water dish and he developed bladder stones, so I add water to his food.
I add a little water to my other dogs meals now too, maybe a splash or 1/4 cup….just to be sure.
Of course, they may need more bathroom breaks, what goes in must come out.