Don't know about dogs - never had one.  We do have three cats.  One keeps the house clear of all manner of vermin - even plucked a bat out of the air (launched off the coffee table).  The second one announces visitors by running full speed down the hall and through the kitchen - before the bell in rung.  The third one takes out the trash, mows the lawn, does all the shopping, trims our toenails, and does our taxes.

He's a keeper.

Lotus 123 ~ S-Render ~ OS/2 WARP ~ IBM 8088 / 4.77 Mhz ~ Hercules Ultima graphics, Hitachi 10 MB HDD, 64K RAM, 12 in diagonal CRT Monitor (16 colors / 60 Hz refresh rate), 240 Watt PS, Dual 1.44 MB Floppies, 2 button mouse input device.  Beige horizontal case.  I don't display my unit.