Not a good idea at all.. lol sorry.. wrong game.. however, an event, i think this would work for an event. i have no freaking clue what kind of event would involve the temporary ability to purchase pets.. but it might work a bit then.. even then they would have to texture, animate, model etc the animals then create a new animal game mode so people could still play the game unruined by players with their 'pets'. I hate to be a nay sayer, but yeah... its too much effort, work, programming etc for such a thing.. they would better invest their time in improving upon other things..