This. When she first got her kidney diagnosis, the specialist told me her BP was 270. I almost fainted. Even with the spleen removal several months earlier, her BP had not topped 140 after the first day. Since my own homecare vet was on vacation he offered to send a vet tech to my house to take a reading. My own vet came home in the meantime and he came and took the reading at my apartment...outside on the street in NYC which is where my crazy girl was comfortable and she was in the 120-140 range. Can a local tech come and take the reading for you?
I have an iPhone app that is accurate...when it works but don't know if it will work on a dog.