feeding whey protein powder

you know the ones that come in the small plastic containers for gaining muscle
I was wondering if I put that dry over the pigs feed if they will gain more or if it will just be fat gained

I've done it before. I used to work next to a GNC and we shared a dumpster with them. When their products "expire" they just throw them out. I took home about a quarter of a pallet of stuff, including chocolate protein bars and such. I also had waste milk and whey from a cow at the time so I would mix a whole tub with that. I also did it with water. I don't know if it was necessary, but I thought that if it was me, I'd have a tough time trying to choke down a half a pound of powdered whey protein. The stuff is high in protein so they seem to convert it pretty well. They didn't get fat. They just kept growing. The stuff I got clearly said on the back that it was made with GMO soy. I didn't worry about it because at the time I was buying feed from the local feed store which most certainly was not GMO free. I did manage to finish and fatten them for two months on pasture and organic feed stuffs from the garden. I don't know if that undid the GMO feeding for sure, but it made me feel batter either way.

It is protein, they will eat it. If you can get it expired for free or freaky cheap some way, I would use it.

I would avoid soy if I could, but if my choice is expensive soy or cheap/free soy--I will go with cheap/free soy. Bonus that you just kept that much more stuff out of the waste stream.