Raw veggies are fine if you liquify them. Dogs can't digest the cellulose wall so they can't get at the nutrients inside. So the raw veggies literally go in one end and straight out the other. Dogs get little, if any, benefit from chunks of raw veggies. So if you want to feed veggies as a nutritional supplement, you should either cook or liquify them. However, I'll feed Giselle a giant raw carrot every now and then if I'm running low on bully sticks and RMBs.

As for frosted mini wheats, I would say no. Plain mini wheats should be okay for an occassional treat, but I don't think jolting your dog's system with a sudden increase of pure sugar would be beneficial. I'll sometimes use whole wheat bread chunks for Giselle since she looooves carbs for some reason.