What contractual element is described as perhaps the most telling sign of a truly responsible breeder?

Answer

A Return Clause requiring the dog be returned to the breeder if the owner cannot keep it

The Return Clause, which ensures the dog must be returned to the original breeder at any point in its life if the owner cannot care for it, is cited as the most indicative feature of a truly responsible breeder.

What contractual element is described as perhaps the most telling sign of a truly responsible breeder?
DogreputationpetYorkiepooBreeder