Bull Respawn Rates too low?

[Darwin]

I adjusted the spawner so you should see them spawn a little faster. Real farms only have a few bulls to "service" many cows. It's no different in UO. If you have a character there killing cows you up your chances of a bull spawning in its place (assuming your bulls are being killed off in a timely manner) Also, you may have more luck tracking in the wild and finding some locations.