Quick nutritionally balanced food recommendations that don't need to be cooked?

Hi, I'm seeking a bit of help. I've been needing to take care of my baby niece during the workday hours as a matter of emergency. I'm making sure she's set, but I'm really struggling to get my meals in and I'm losing weight pretty quickly. I have two dogs so just putting her down and making some food is an issue. Im trying to cram food in before she arrives but I struggle to eat first thing in the morning. Is there anything anyone can think of that I can make super quick? I'm finding myself cleaning when she naps because a baby and two dogs makes for a lot of mess very quickly. There's only so many tuna/pb sandwiches I can take and microwaving leftovers tends to wake her up