After checking the html and making sure that it wasn't a truly unique site, I had a look at how Yahoo! works. As it turns out, Yahoo! doesn't use either metatags or the first 250 characters to catagorise WWW pages. It uses information provided at the time that the link is added. Here is an extract from their instructions for adding pages.
Suddenly it occured to me that there might be other groups of words in that list of search terms that might lead to unique results. Sure enough, " netscape software", (number 5 on the list), returns only one result on Yahoo!! It doesn't even have the words in the title - just in the 20 word description. That description is pretty important.
So "persian kitty" is not so unique or clever after all. And probably anyone who had been using Yahoo! for longer than me could have told me that. To test the idea, I decided to conduct a little experiment.