Update How long do you let you dog go if she is sick?

I'd give it until tomorrow morning unless things take a turn for the worse.

Dogs have short digestive systems and usually work things out in short order. Plenty of water available, but I wouldn't offer food unless she "asks" for it.

For example, our dog threw up on Friday morning - three times between 6 am and 9 am. And then nothing. He slept more than usual, but wasn't behaving in a way that worried me. He didn't eat breakfast; he did eat dinner. I kept an eye on him all day and if anything had gotten worse, I would have taken him in. By Saturday morning he was 100% back to normal. I don't know what caused it, but he gets very stressed by the vet as well and so while I'd never not go if I felt care was necessary, I don't immediately jump to it unless I have a fairly definitive cause for concern. (And I've had pets my entire life and consider myself a pretty diligent and knowledgeable pet owner, so I think I have a good barometer for when there's real cause for concern and when not.)

Poor baby. I have called the vet in times past. They can tell you if you need to bring her in sooner or if later is ok. Especially if you share your concerns, they don’t want her any more distressed either.

My elderly dachshund (16yo) often skips meals, I figure her metabolism has just slowed and she doesn't need as much food anymore. She isn't losing weight and eats well most of the time, but certain times of the year she has less of an appetite. I wouldn't take mine to the vet at this point, though I might give them a call - usually when our pups have tummy trouble we cook them some rice and/or add pumpkin to their food depending on their symptoms. Hope your pup feels better soon.

Annie is a cutie!

Normally, a vomiting dog doesn't gain much attention for a vet. Dogs eat stuff and they are designed to vomit up what doesn't agree with them. So a one time thing is NBD (no big deal.)

BUT, your Annie is 12, which isn't a young girl anymore. I'd do as Jengie suggested and call the vet. They are likely to have to withhold food for 24 hours and then reintroduce. Some will just give regular food, others may suggest chicken and white rice.

I'd keep her with you today if you can and just observe. Does she wag her tail? Does she play? Does she have some pep in her step? Those are your biggest indicators that something more is wrong with her than an upset tummy.

Sending healing thoughts your way.

i'd go by the end of the day if nothing she still seems lethargic

24 hours or if they look lethargic and haven't urinated in awhile.

Hope she feels better soon!!!

Two years ago my older guy ate something and got sick. I was in Atlanta and panicked when my oldest son texted that the dog had puked everywhere-day 2. (Not sure why they didn't lock him up after the first few pukes since they were home to witness that.). Dog was acting sick and puking. He wouldn't eat (huge red flag for me). I called my husband and told him to get him to vet immediately when he got home (in about 30 minutes). The vet said my guys were the saddest pair of men she'd ever seen. They didn't know what he'd gotten into, how many times he'd thrown up, the last time he'd eaten etc. Vet said they just carried in my boy who had dropped 5 pounds in a day and said make him better. They knew I would have been pissed that they waited. Fast forward to this weekend. Similar story. Not sure what he ate, but I watched him carefully. Checked his fur for dehydration and kept him close. He is better today and acting like himself again. I treat my dogs like my kids. If I would have been concerned about a kid acting that way, off to the vet they go. We don't go often, but sometimes you just have a gut feeling.

I honestly and truly was not criticizing you in any way, shape or manner.  I hope you don't think I was. I was just responding to your question with how we handled Tucker.  I know that everyone handles these situations quite differently and I am certain that some people would think we were NUTS to respond so quickly rather than waiting a bit to see if it was just a passing thing. 

It sounds like you have a wonderful and caring vet and it sounds like you are a very caring dog mom.  Annie is adorable and I am very glad to see that she is doing well!

OMG she is adorable! I'm so glad she is feeling better!

Adorable! So glad to hear she is feeling better!

My female vet (we have a male and female) is so cuddly with my dogs.  When she comes into the room, she sits with them and snuggles them and hands them a few treats.  The vet techs are also very hands on and my dogs do love the attention.  Now the male vet calls my male dog little bastard.  We always hope we are getting the female. vet.  . Perhaps your pup needs a tiny tiara.

Glad she's feeling a bit better. Annie is a real cutie!