My 13 week old english staffy eats quickly and gets a bloated stomach. Is this dangerous?

It is not normal and it can be dangerous. Put a large clean rock in the middle of his food bowl so it will be harder for him to get to the food. This will slow down his eating. Or put his kibble in a Kong or something similar so he will have to work at it and just get a few pieces at a time. Hope this helps.