Btw, has anybody noticed the dichotomy between popular representations of dog and cat people? Dog people, the cliché goes, are rugged, well-adjusted, extroverted, go-getting types (you could imagine Tom Hanks and Meg Ryan meeting in some romcom whilst walking their dogs in the park). Cat people, however, fall into a number of stereotypes: the crazy old lady, the misanthropic loner, the the moody teenager who writes woeful poetry by candlelight, and so forth; so much so that fondness for cats is a code for eccentricity, or mental instability.
...re your pitch for Hanks/Ryan meet-and-fall-in-love-walking-dogs, it's been done: "Dog Park", horrendous, except for the appearance of Natasha "Species" Henstridge in an unexpected haircut. Normally wild horses couldn't drag me to see something like this, but it was an in-flight movie and I couldn't sleep.
Erk. Sounds. Horrible, Toby. Actually, technically I'm a chicken person at the moment.
dog/cat is not a dichotomy. the opposite of cat is not-cat.