SUMMARY: Dogs see shapes.
Tika goes nuts when she sees another dog while we're out on a leash. She makes a ruckus, but in fact she really does just want to go check it out and then she's happy. She just doesn't often *get* to go check it out, dang Human Mom.
Photos from the web--things that Tika has actually mistaken from a distance for a person walking a dog on a leash:
Tika also is ready to take off like a rocket--from 0 to 60 in a nanosecond--if she thinks some critter is running. Image of something that almost got my arm ripped off--shoulder hurt for days-- because I was thinking, "innocuous inanimate thing blowing in the wind that dogs would have no interest in" and Tika was thinking, "Thing run! Me chase!"
Now she has cataracts, which the vet noticed yesterday are getting a bit thicker, so who knows what she's going to mistake for something else.