The following are how I learned them from Teacher Lei Shi Tai and he stressed that they could be practiced anyway you felt or in any order it was not important to do them strictly following a predetermined order.
I first learned Ma Xing (Horse) and there are two ways of doing this form a traditional straight line way and also a way using exchange step making it a practical method, it charges like a horse excluding the opponents guard or dragging the opponent towards you then hitting him with two fists.
Hu Xing (Tiger) was next and this involved a small step and jump to close the distance to the opponent and the footwork is at 45° as the opponent is pulled and pushed.
I then learned Tai Xing (Ostrich) again the start of the form involved a small step and a jump then stepping at 45° a double punch then a double block up is performed, the double block up is performed very fast before the next step is taken to perform the double punch.
Toh Xing (Llizard) this is done in a circular motion a bit like Yun Shou (Cloud Hands) using semi circular stepping this can also be done in circles forwards or backwards it is a very flexible form.
Yen Xing (Swallow) is a simple form with some devastating movement including jumping and a very powerful punch it swoops down to unbalance an opponent and also has some Qi Na.
Ji Xing (Chicken) this is a very powerful form and devastates an opponent rattling their teeth and shaking their bones.