Hey Chey, every puppy will have some kind of side effects from their shots. Some aren't very obvious - like they nap a bit more; some are more obvious, like they develop a bad case of diarrhea. In most<?> cases at least one of the virus' in the mix are live virus' so effectively your vet had caused your pup to catch a minor case of the disease against which the vaccine is aimed with the intent of providing long term protection.
Deworming medication often causes a loss of appetite and lethargy.
These symptoms should clear within 24-48 hours. If not it's time for a vet visit ....
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