You don't usually see a lot of bulls together.

Might be a cow.

Might be a cow.

It appears to be a bull....cows normally have teat's?!?

"No other objects are allowed in your photo", I thinks trees and grass qualify as other things.

come on now! "other things" can be the white poster board you use as a background or the black fabric you use to place your subject on. I think they mean "other things" as in people, flowers, electronics, animals, plates, beer cans, etc. etc.

I agree with k5683, this is clearly a picture of a bull, not a picture of trees etc.