Don't worry too much. Zoe went in at 6 mos, first thing in the morning around 7:30 a.m., and the vet called us by noon saying everything went well and she was awake. I would be sure to ask your vet to call you as soon as she wakes up (ours always did) or check in at lunch time. Are you dropping her off first thing in the morning?
I picked her up that afternoon, around 5 p.m., when I left work and thought she would probably be sore and groggy. Oh, no! She came sprinting out of the back kennel area, jumped in my arms and started kidney beaning right there in the vet office.
Then once we got home she never stopped, greeting my husband, then Jake our yellow lab, playing as if nothing ever happened.
Her scar was so small we couldn't hardly see it without studying her stomach VERY closely. We restricted her activities for a day or so, just to be sure, but she never had any problems. Ate normally, went to the bathroom, etc. as if nothing ever happened. It was quite a dramatic difference from when we brought her home after her ear cropping, definitely much more pain and suffering, grogginess after that than spaying.
Good luck, I'm sure everything will be fine. If you trust your vet, then don't stress over it. Just be sure to check in or have them call youfor peace of mind after it's all over. Keep us updated on how it goes! Jessica
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Zoe-1/16/00, plain fawn, cropped, spayed, docked
Jake-2/3/98, yellow lab