Overweight?

Hi, I took Belle to the vets on friday for the second part of her yearly booster, on finishing the injection and after the vet trying to what I felt like was find something I could spend more money on, she said Belle was slightly overweight as she could feel excess over her ribs, and if I wanted to come back for a chat about it I could make an appointment!
I left a bit bemused as 4 weeks earlier at the same vets but a different vet, she weighed her and said she was in really good condition, i happened to weigh her on friday when I got there and i can't remember but it was there or there about the same as 4 weeks ago...plus I think shenis a pup, and it is winter and she is not getting as much excercise as she will during the lighter nights! Any thoughts on this please? By the way she weighs 21.6kg.

I never go by weight just by looks. The ideal condition is the back two ribs being visible. I wouldn't woory at all about a pups weight though

I agree with JStaff. Just run your fingers down her side and if you can feel her ribs then there shouldn't be a problem. From above, her waist should tuck in slightly after her ribs
Being a puppy she will have plenty of time to grow into it.

With being a puppy.as above wouldn't worry too much