Hugs! We are all doing our best! It sounds like they are pretty stressed to be out of their routines, and Sunshine snapping at you is probably part of that. For now, just move more slowly and watch for her to tense as you reach toward her food. If she tenses, see if you can call her out of the crate, offer a toy or treat away from the food, then pick up the food. I hope the construction is done soon so you can all get back to normal routines!
First time Chihuahua owner with many years of dog experience!