How about full on sentances let alone words? Ours know the standard assortment like cookie, car ride, walk, are you hungry, get off the ____, and all the trick commands like sit, stay, etc. Several years ago I figured they knew about a good 50 or 60 words as well as do you want _____ (fill in the blank, say, 'to go for a car ride' or 'food') and several other general question type statements. It got to the point where they would get excited when they overheard a recognizable word in general conversation and think it was meant for them. Thus we were having to spell out certain words when speaking to each other (Gee today I ate a big lunch so I took a W---A---L---K afterwards). We also started using American Sign Language so sometimes I don't even speak to them, I just sign to them. Instead of asking them are you hungry at dinner time, I just stand up, rub my belly in a circular motion, and they instantly run to the kitchen to await their kibble! What I find fascinating is the fact they can read faces and lips and learn the words (just certain sounds to them obviously) and communicate back to us with their body language (see the post about how our dogs wake us up by Dillion's Dad) and their noises and facial expressions.