I don't know about suicide... but I know they cry!!!!! Seriously.
I have seen animals cry during Bakra ID, when they see the other animals right in front of them killed.
It's good that they do not act out on their emotions and go beserk killing/fighting everybody. I still remember the cow with big tears rolling down and standing in the corner, while her buddy was dragged out and finished.
It was sad :(
I agree with Psyah , but can someone please explain me this concept that **NJ **has mentioned ... I have always had this fear that animals feel the hurt when other animals are killed in front of them ..... is that so?