Is mixing a curling shampoo with another shampoo mostly organic ingredients, a good idea?

I mix an organic shampoo for naturally curly hair with pantene. I do it because ';normal'; shampoos have too much protein for my hair so it gets brittle. A 1/2 and 1/2 dilution is good for me. Go ahead and try it, it works great for me!!!Is mixing a curling shampoo with another shampoo mostly organic ingredients, a good idea?
You won't be able to tell the difference, most all shampoos are alike anyway, I've done reasearch on it