Really sad to know that Hey Hey is sick and had a high fever, don't scare, it is better to see one more Dr. for consultation. If Hey Hey still can play and eat , you don't need to be too worry.
Koko had fever for 13 days after the 1 year's injection in Sept, and took medicine for 3 weeks ah.
Don't worry, feed him more water and don't get cold. ware enough.