I was curious once i read your post and looked it up in our pet health book. This book states that studies indicate dogs with high blood pressure can benefit from Omega-3 fatty acids that are found in certain fish especially salmon. They say you can feed your pet salmon or tuna but it would be expensive. Of course this is qualified by saying to consult your vet first. Looks as if the mega dose of salt would be more harmful in the way of the "trots" and stomach discomfort.