Vaccines can cause temporary lethargy for a day or two in dogs as in people, but if she continues to not eat well or act normally, then you should take her back to your veterinarian for exam +/- bloodwork.
My female is drinking, has a cold wet nose, pooping and peeing normally and does not have fever and the knots around her teets are just milk ducts drying up. So why would all of the sudden right after a baby shot would she stop eating. I put her and her food in her crate today and as long as i wasn't looking she started to eat.
Last night i told her i would give her a piece of candy and she ate her whole bowl And if i put hot water or anything on it she will eat.
So, why all of the sudden has she stopped eating her dry dog food? Is she just being stubborn?
The mammary glands can become quite enlarged during a false pregnancy, but should not be hard, inflamed or painful. I worry that she is not eating well and seems dull, and I recommend taking her to your veterinarian for examination to make sure that she does not have a mammary infection/mastitis or uterine infection/pyometra.