Oh Boy what a look inside my head you have now!!

So here I sit it is after 1 am and I would love to be sleeping but I can't. I am sure you are wondering why it is that I can't sleep, it is not for any of the normal reasons that people don't sleep. The normal reasons in my mind are money, love. children and work. No I can't go to sleep because I am focusing on so many different and strange things. For a while it was taxidermy, I wonder how it works, and why people would want dead things hanging on there walls, and why is it most of the time people only have the heads of things on there walls. Is it because they don't want huge male animal parts hanging out, I am sure I would not want to walk into a lodge and see a big deer penis staring me in the face.  OMG I am laughing my ass off at that thought. I hope you are too. The next thing that came to my mind is zombies, yes that is right zombies. I was trying to figure out what would happen if there was a zombie outbrake. How long would the zombies last if they only eat humans eventually the humans would run out don't you think? and why do zombies only eat humans. I know in "The walking dead" the zombies eat a horse so I guess that is a good thing. If the horse turned into a Zombie horse would it only eat other horses? and in Resident Evil 3 the crows fed on dead flesh and turned into zombie crows, and at some point they must have attacked there own kind because there are about 300 of them that attack at one point. Does that mean they had turned all the other crows into zombie crows and the only thing left was the humans? What does that mean for other animals? I mean the dogs that are in the Resident Evil movies are experiments gone wrong and they seem to want to attack only humans but they must attack other things as well, but the movies don't go into that much detail. Another thought I just had but the name of the movie is not coming to me at this point, and I can't remember the actors name either, but he is the last man in a big city and he goes out every day to use his radio to see if others are out there and he has a dog, and the dog gets bit by a human zombie and he has to put the dog down. Anyway I guess my point is that humans will feed off of dogs if they have no other choice and I am guessing that every other living thing on the earth would start with there own species and than move on when they have no access to that anymore. But why on earth did the creators of zombies make it so that the things fed off of there own kind? could you imagine zombie cows? I don't know why but for some reason that is the first animal that I thought of that I would not want to meet if it were a zombie. I couldn't pick something more menacing like a tiger or lion, I had to go for a cow.