It definitely isn’t the vaccines. Have you introduced anything new to the home environment (foods, cleansers, etc)? Was she outdoors where she could chew on things like mushrooms, plants, etc? Make a list of everything you did in the previous 24 hours and it will be one of those.
Where I'm at that's a huge list on the outside possibilites. The one thing Rattys do like to do though is sniff more than usual. Only other thing is there's a lot of wild rabbits around in my front yard bit dogs leave them be.