Why is my mezican king snake not growing?

[Panntyman]

I agree with everyone post. The more he or she consumes the faster they grow. I've personally never kept any colubrids but I've seen them in action. And I personally don't start none of my snakes on mice rat pups and up all my retics started off on 2 rat pups and the boas I've kept my rule of thumb is I up the size after 3 or 4 feedings of the same size then upgrade.