We have to be very vigilant about wasps that get into our house. Our two cats like to play with them and on occassion they get stung. Many of us know what it's like to be stung, but for a 15-pound cat, the sting is a pretty severe experience. Symptoms include:
Vomiting, notably saliva
Lack of appetite
My observations are that this lasts about a day and a half.
Images taken in a controlled environment or with a posed subject. All subject types.