My cat is acting very odd after being fixed..?

So i have two girl kittens (siblings) one is 5 months and the other is 8. i just had them both fixed today. the 8 month old is acting tired and lazy which i expected. the other one, who also got an umbilical hernia removed, is freaking out. she was standing in her water bowl (both front paws in) for a couple unites then she started flinging water out of the bowl. i figured maybe it was the bowl so i got a different one and still, freaking out. any explanation? i think shes high but im no vet.