Do Bulls Hate the Color Red?

I don't know how well this relates to the article, but I thought it would be interesting to bring up. The other day, I was watching an animated movie called Barnyard. One thing I noticed is that the male cows had udders. This is just my opinion, but I thought it was very disturbing and unneeded. Maybe it's supposed to be a joke, but I also imagine that it would confuse kids as well, who need to be able to tell the difference between fiction and reality. After all, "cow" only relates to female, and they're the ones who have udders. However, "bull" refers to male, and they don't have udders.

Speaking of being colorblind, I have always wondered how people are able to tell that animals are colorblind, since that might be rather difficult to do. Perhaps one way in which they go about doing this is when people look at the eyes of certain animals, through x-rays and experimentation, they notice that some animals lack the color receptors that people do. This could be a possibility, and that makes it all the more interesting. I imagine that it must be quite difficult for animals with (partial) colorblindness to adapt to their surroundings, as their perceptions would need to be based on movement, more than anything else.

From reading this article, it really shows that animals perceive the world a lot more different than we do. Not only do they view colors a lot more different than us, but on another note, some of them don't even see colors. On the other hand, considering how bulls are colorblind, I've always wondered how it became a running joke in the media for bulls to be attracted to red capes, unless it was more based on charging at anything that they see. Overall, while it's true that animals view the world a lot more different than we do, their perceptions and body language are quite interesting.