If he gets worse before 24 hours are up, contact the veterinary clinic immediately and talk to the reception staff that may be able to connect you through to either the veterinary or clinic nurse who can discuss whether or not it sounds dangerous enough to
require immediate veterinary help.
Seek
immediate veterinary help if your pet exhibits signs of plague including lethargy, poor appetite, vomiting, diarrhea, fever, and enlarged or abscessed lymph nodes.