How to curb puppy dog aggression?

To answer your food/new toy question first--this is fairly simple to work on.Take a treat, such as Pup-peroni, and give her a piece. Then break off a bigger piece (you have to be able to hold it) and offer it to her. As she takes it, remove it, and pet her. Then do it again. And again. Same thing with the toy. Don't do it all the time you give her the treat/toy, mind you, but try to work on it every day for a few minutes. Food aggression and toy aggression is normal in dogs. As for the wiping things down, it could be that you are removing her smell from the area. As to the crate issue, that might just be because she's still in pain. Talk to her calmly and gently through the door--she might be experiencing territorial instincts as well.