Zu dem Geschirr (ist wie die meisten No Pull Geschirre nicht empfehlenswert. In Deutschland gibts das Sturmfrei....*schüttel*) hier was interessantes :
A well fit flat harness allows the dog to
move normally and freely. It is used only as a device to keep the dog
safe, like a seat belt, rather than as a training tool. If a dog does
stop short, the pressure of the straps is spread over a wide area
(rather than concentrated on a narrow strip on the neck) and all areas
have either muscle or bone that protect the organs so injury is much
less likely.
Unfortunately, all 'no-pull' harnesses can injure
the dog in different ways depending on the their design. Those that are
not long enough chaff the dog's skin typically behind the front legs,
others tighten around the chest with leash pressure, still others sit
across the shoulders to limit proper motion or tighten across the chest
to change the dog's gait. All of these can cause health issues on a dog
and are punitive in nature. Dr. Chris Zinc, an expert in dog sport
mechanics, has done research on this. "In
a limited gait analysis study, Dr. Zink observed that dogs wearing
no-pull, front clip harnesses bore less weight on their front legs than
they normally would – even when the harness wasn’t attached to a leash!
In addition, the dogs bore less weight on the leg that was on the far
side of where the person walked, even when there was no leash attached;
when the dog had a leash attached, it was more significant. This
suggests to her that the dog was reacting to the presence of the harness
against the leg by pushing harder against it. In all cases, the gait of
the front limbs was altered whenever the harness was on." Whole Dog Journal July, 2013
The
best harnesses allow the dog to move freely. They have a Y joint that
should fit over the breast bone. They have a chest ring or back ring or
ideally, both. This gives you the option of clipping the leash to either
or both locations at the same time to provide the dog with more
information.