There is no explanation for why this puppy turned out green.
Hulk is a fitting name for this lil green guy.
All his brothers and sisters came out with normal colored fur, but Hulk is just extra special.
Apparently the discoloration comes from a rare condition where the puppy soaks in its own stool in the womb.
Ew.
Either way, Hulk is happy and healthy and that’s what’s important.