aww hope thats the case with pippin and mable. they have unlimited birgess excel fresh forage grassIt is on the small side, but they can still catch up. One of my first piggies was a similar size at that age and still grew to a normal average size of just under a kilo!
Please feed plenty of good hay! here is more information on a healthy diet:
http://www.guinealynx.info/diet.html