Protein powder issue, one foamy and one not... why?

I bought the Dymatize Iso - 100 Hydrolyzed in strawberry. I have been mixing it with water and it turns out great. It's smooth, everything dissolves completely and it's not very foamy at all. Then I got this *kitten* called Pure Protein from Wal-Mart simply because it was so cheap and I wanted to use it to cook with. I made one shake with it just to try it out. I mixed it the same as my other stuff, 8 oz of water and 1 scoop of powder. I noticed that the entire shake pretty much turned to foam. It was kind of like shaking a container filled with water and dish soap. I shrugged it off and decided to make pancakes with it the other day. I had already made some pancakes with my other powder that came out pretty good but this other stuff just doesn't want to cooperate. Can anyone tell me why this Pure Protein acts this way. Something besides "it's a cheap Wal-Mart product" would be appreciated lol.

Edit: I used the Blender Bottle with both proteins