It is a normal reaction for a cat to wilt after receiving the rabies vaccine. Some cats with poor physical constitution will have symptoms such as poor energy, loss of appetite, vomiting, fever and other symptoms after receiving the vaccine. Some cats may have allergic reactions. , usually it will resolve on its own in 1 to 3 days. If the cat does not improve after three days, it is best to take the cat to the pet hospital for examination to avoid unexpected situations.