The purpose of the springer is that the dog happily trots alongside and does not get tangled up with the rider (me) or the wheels.
Not true. My SBT hates it and refuses point blank to even go near it, let alone trot alongside. My other dog (SBT cross) loves it but won't trot, only gallops. She's a really game dog but a bit on the old dangerous/reckless side. She's still in training though so she should come right in the end.
Lisa