TOTW Dog Food and Gas

I've been feeding my dog TOTW Dog Food and she has horrible gas and very smelly poops. I actually called up TOTW and was told it might be because of the high protein content 32% (High Prarie Formula). Anyone else with this problem? She's a 5 month old boxer dark reverse brindle. If not this dog food, what do you recommend? I'm thinking a non grain dog food because she is a boxer and has sensitive skin.