Nanook has just started to bark about a year ago, mainly due to the fact that he is getting deaf. He pretty much only barks when he wants attention & doesn't want to or can't get up to get to you. He barks on command too.

Raustyk pretty much only barks to warn you of a noise a visitor or the like. Can not get her to bark on command.

Kaige barks sometimes as a warning of a noise/visitor etc... but not that often. He does bark non stop when he plays with another dog though. Working on teaching him to bark, no luck yet.