Kidney disease and/or Failure would cause the elevated
Calcium, too...However, the Kidney
levels would have shown up on the regular
blood panel as an issue....
Your dog hasn't been eating any Chicken jerky treats has she? THese are ALL poisonous if they are made in China, which most are.....They are causing an alarming amount of illness in Pets, so I wanted to mention it.
If your Vet doesn't seem to want to find the root cause, then you need a second opinion....