Mild lethargy or a small lump at the injection site can be normal. Facial swelling, persistent vomiting, or collapse are emergencies.
Monitoring checklist
Temperature perception at home is unreliable—watch breathing, gum color, and willingness to walk.
Pet NGON may postpone grooming if your pet is febrile post-vaccine.
Book bathing once appetite and energy normalize per vet advice.
Next step: ER for swelling or collapse; otherwise call your clinic for mild prolonged fever.