These are typically purchased with a specific purpose in mind, for example the heavy - duty crates might be necessary if your dog is an escape artist or if he has been able to destroy other crates in the past, while more decorative dog crates are better suited for more docile dogs who won't chew their way through the wood frame. (woofwhiskers.com)
She needed a farm to host an audacious experiment dreamed up by geneticist Dmitry Belyaev: to create a domestic animal as docile as a dog from aggressive, wily silver foxes. (sciencenews.org)
Previously owned the other well known brand and my very docile dog would try to bite it — or me — anytime I tried to groom her. (topdogtips.com)