Liz Buchanan BVSc
Hello! This sounds like a complex case. Salt toxicity is difficult to treat as the speed of correcting the salt imbalance is important - it needs to be done in carefully calculated increments. It sounds as though it's worth getting the vets or even their emergency counterparts, to review the signs that you describe in order to check that they are happy. Changes in salt concentration will affect a dogs' thirst quite considerably, as will the administration of fluids (high salt concentration leads to excessive drinking, for example), and it's worth making sure that the vets or their emergency counterparts are aware of the changes you are seeing when you see them, in order that they can intervene in a timely way if they need to.