How Wide Your Horizons?

"Charley is a tall dog. As he sat in the seat beside me, he head was almost as high as mine. He put his nose close to my ear and said, 'Ftt.' He is the only dog I ever knew who could pronounce the consonant F. This is because his front teeth are crooked, a tragedy which keeps him out of dog shows; because his upper front teeth slightly engage his lower lip Charley can pronounce F. The word 'Ftt" usually means he would like to salute a bush or a tree. I opened the cab door and let him out, and he went about his ceremony. He doesn't have to think about it to do it well. It my experience that in some areas Charley is more intelligent than I am, but in others he is abysmally ignorant. He can't read, can't drive a car, and has no grasp of mathematics. But in his own field of endeavor, which he was now practicing, the slow, imperial smelling over and anointing of an area, he has no peer. Of course his horizons are limited, but how wide are mine?"

(Steinbeck, "Travels With Charley," p. 24)