Check the contents on the side of the pack and if there's a lot of salt or sugar then no. Remember salt and sugar have a variety of names they go under as well. I'm not familiar with Ritz crackers so unfortunately can't really help.
Loc: North Carolina
I wouldn't think so because, as Aerial said, they are high in sugar AND salt so I wouldn't Even if he could eat them, they probably have no nutritional value, so there's no point. Try feeding him fruits and veggies - those are good for keets!
sorry to jump in on your thread picos but as its along the same lines has anyone tried feeding their budgie mealworms. They have started arriving in all my local pet shops for wild birds, just wondered if anyone had tried.