It's the narrow corridor behind the consulting rooms which I ask owners to trot their lame dogs up and down.
Recently, I've realised that diagnosing lameness this way is just pants.
Most of the dogs try and dive off into another consulting room, or worse still the cattery.
Meanwhile nurses lay helpful obstacles like clinical waste bags in their path, which always deserve a good sniff.
Owners have NO control, teachers who complain about kids in schools today will empathise with this. Walking in a straight line is an impossible task.
Sadly, some owners of lame dogs are overweight. Therefore their pets are overweight too and will suffer with joint disease.
I watched one such owner this week, his girth so great that I couldn't actually see the dog and decided I'm giving up on runways.
Bring on the X-rays.