I've said it before, but I really recommend Turbo Tax. Among other advantages, if you use it every year it will automatically import whatever you need from previous years. If you are depreciating an asset over a number of years, it will keep track of it for you and carry it over each year, so you only need to enter it in the first time and then it will go by itself until it's done.
I have no idea what the rules are for depreciating breeding animals, but TurboTax will usually put you on the right track for finding out.