I'm willing to bet the high blood pressure comes from the saline. Too much salt does that to humans to.
Can't you hydrate the food a bit with some water so you can cut down on the saline?
Hadn't considered the saline causing the high blood pressure. Wonder if the vet can give us just sterilized water instead of saline?
We do add water to his wet food, make it kinda soupy just to get a little more water into him.