This month's Animal Cognition journal carries a sweet little gem of a study on when babies and dogs understand what it means when adults point. Kids up to age 2 and adult dogs only pay attention to whatever body part is outstretched — be it arm or elbow — and ignore whichever direction the index finger happens to point. But at age 3, kids grasp they're supposed to pay attention to the finger even if it's pointing in the opposite direction of an outstretched elbow. Dogs don't.
I don't know about you, but I know with dogs — and maybe soon I'll find out with really young human kids (?) too — that puppies spend months just sniffing your finger before they understand the whole gestural pointing thing. Both Katy and Yuki were finger sniffers before they looked in the direction of a pointing hand. I didn't keep track of how old they were before they 'got it' but I bet that you can measure a dog's intelligence based on how early during their development they stop sniffing your finger when you point.
The authors of the study conclude that children and dogs show generally similar abilities to understand gestures like pointing and directional glancing because of their shared environment and long history of co-evolution.
Glancing at what you want is a great way to communicate your desires if you can't speak. Yuki just recently figured that out and now looks up at her leash and then at us, repeating the leash-look/human-look sequence a couple of times. Katy goes one step, nah, make that six steps further and backs herself up while whistle-whining and going through the look sequence. Backing up is something I taught her to do early on because she'd lunge and snap at my hand to try to get a thrown toy within an inch of it being released. More often than not, I got chomped instead of having a nice game of fetch. So I taught her to back away — and wait for the throw. It wasn't long before she generalized that to anything she wanted: treats, morning and dinner chow, walks, pats. We joke all the time that when she really, really wants something, she'd back herself right into to the neighbors house if she could.
I know I will have a load of fun observing the three 'kids' interact and learn from each other. I really hope the baby doesn't ape too many things from the dogs! Glancing to indicate what you want — YES! Licking the floor and carrying around rope bones in your mouth — NO.