Joe, the pictures from the first post are of a Dendrelaphis pictus (Painted Bronzeback) and yes, they should be considered harmless. They have rear fangs, but the venom is weaker than many of our local ants. They always try to get away whenever the opportunity is given.
The only thing that is a real danger to your piglets is a medium to large python. The shed skin is definitely not a python. Even a cobra is not a serious threat to the piglets, since biting is an action for hunting and defense- a piglet is neither food for a cobra nor is it a threat. I would have to examine the skin to figure out exactly what kind it is, but from what I can see of it in your pictures it resembles Coelognathus radiata (Radiated Rat Snake), like the one Parrot posted. Counting all the different types of scales would give an identity to the snake. I have sent you a PM if you want to send these things to me by mail, so I am able to make a positive identification. I will be back next week and let you know what it is for sure, if you decide to send it to me.
Parrot, that is a Coelognathus radiata (Radiated Rat Snake), a completely harmless snake. As its name suggests, it feeds primarily on rats. These snakes are much better to have around than rats, which carry and transmit a multitude of threatening diseases. Although it puts on quite a defensive show (puffing up, hissing, striking wildly), the worst it can do is draw a little bit of blood from its bite. Since their mouths are clean, no worries about infection either, unless the infection comes from something else. I have never had an infection from a snake bite; although, I actually have not been bitten very often by wild snakes (can't actually remember the last time).







or is it the way the photo was taken ??
and a few pet 
