Something positive at last!
The problem seems to be an inflammation of her large intestine, not a blockage, so there will be no surgery. Holly will be on frequent small meals, pills and close observation for the next few days. We have to take her back at the first sign of anything wrong. Only gentle walks are allowed.
I weighed her as we left the vet. Since last week her weight has dropped from 28.4 kg to 26.7 kg.
Apart from a small portion of chicken and rice she hasn't eaten since Sunday. The vet gave her a small tin of food for sensitive stomachs, and apparently it went down in two mouthfuls.
Holly is now at home.