We are based in Thailand and it is meant to be a water buffalo (Too may companies here are using elephants). Cows and bulls are also popular in other "Domain Meccas" such as India, the US and China.
Also, people might ask... Why are they using a bull / buffalo for a domain business (like you did)? And then they hopefully will remember it. If you see a ".com sign logo", no one will probably even notice it.
It's like your sun. It brings value to the name :P