We have twins both the kids are in good position ( mentally and physically) weight as 14.7 kg and 15.1 kg . Age 2 years 4 months. On Saturday they had their vaccine and one of the kid started a sort of limping. He is not having any pain. Any swelling or redness. He is jumping, standing and even climbing but while running and walking we can see that he is not walking or running properly . Pls guide on this