They'll all adjust faster than you realize. She just had major surgery and her body feels different and her balance is off. That will make her act insecure until she gets sure footing. She probably smells different because of the scents and odors she was expose to at the Vet's. She'll be up and running in no time and they'll be best buds again. Pamper her and love her but you also have to let her stretch out and test her new - don't want to say limitations - body changes.
Just keep an eye on them and follow their body signals.