Check her gums - make sure they're pink, not white. If white, she's dehydrated - get her to drink w/ some karo or honey in the water. Make sure her cheeks aren't swollen - if they are, she could be having a reaction. This late after the shot though, I doubt it. Rabies is a pretty tough shot - so she probably could be worn out from it nonetheless. Give her something "carby" like a bit of cereal, cracker, or even yorgurt - a little food boost and water would be good. Once you reply and I know you've seen this - I'll move it to Health.
