Barney is 11.5kg. He recently went up to 13.2kg in two weeks when his food was changed and he looked too porky then.
I've witnessed something with Barney which surprised me. Barney was BARF fed and was always around 11.5kg and he was fine at that, had just enough fat on his ribs. For health reasons the vet wanted me to give dry food ago which I reluctantly agreed to. After he'd put on that weight, mentioned above, I cut back the dry food a bit and he went back to 11.5kg. However he feels too thin on his ribs, there isn't very much flesh there at all. This confirms that its not about what they weigh, the same dog fed two different diets has been just right at 11.5kg and too thin at 11.5kg.