Hi I have a female rottweiler who is 18 months old, I'm just wondering if anyone has an idea of the average weight she should be at this age, as she seems to be a lot smaller than a couple of rottweilers I know.

Hi emma,
The standard height for a female Rotti is 22-24 inches at the wither.

If you stand you dog up so she is standing nice and straight and take a tape measure from the base of his neck to the ground it should be around that height. (a rigid ruler would be the most accurate)
Don't worry if it is shorter, that is just the average.

Do you have any photos you could post to help determine if she is under or over weight?

A side on photo or one looking down on her back would be ideal.

My male rottie is 20 months and he weighs 117 lbs up from 106 4 months ago

My male rottie is 20 months and he weighs 117 lbs up from 106 4 months ago

My male rottie is 20 months and he weighs 117 lbs up from 106 4 months ago

Just found this question. Here's a chart my vet has posted in his exam rooms for people to look at:

dog weight chart - The Purina Body Condition System (http://www.placervillevet.com/canine%20body%20condition.htm)