I keep mine kenneled during the day to prevent people form stealing them. If the pound doesn't pick them up out of your yard, there are
people that want my male for breeding. I have 2 labs and one has
been stolen out of my yard once already, so we supervise there time
out and kennel them while we are at work. I have not had a problem
with them becoming bored as long as they have a few chews to play
with and are let out and worked on a regular schedule.