It’s very important that you don’t consider this too lightly. Vomiting has many causes; most are minor but some are serious. If she starts to deteriorate or the vomiting doesn’t soon stop she should be assessed by a veterinarian even if that means a trip to an emergency clinic.
Just like humans dogs can occasionally have minor gastroenteric upsets that will respond to conservative treatments. We must be cautious though because if the vomiting persists Turtle could become dehydrated and develop electrolyte imbalances. Persistent or prolonged vomiting (or diarrhoea) should be investigated by a veterinarian.
The cause of her gastroenteric upset could be due to ingesting something that is irritant or due to infection (bacterial or viral) but could also be due to metabolic issues (problems with other systems in the body). It is impossible to determine the cause without an examination. However the basics for treating gastroenteric upsets are initially the same regardless of the cause. Often if a dog has eaten inappropriately the body's natural reaction is to vomit in order to eliminate the offensive material. Once the stomach has fully emptied usually the vomiting stops. This is what we want to happen with Turtle.
First you must withhold food until the vomiting has definitely stopped. If you have a Kaolin/Pectin/Bismuth mixture (Kaopectate, Kaomagma, Pepto-Bismol) dose her at 0.5-1.0 ml/lb every 4-6 hours. Allow her to drink water but be careful she doesn't drink too much at once as this may trigger further vomiting. If an electrolyte mix (eg Pedialyte) is available you can mix this with the water. If necessary you can syringe the water into her. A turkey baster is quite handy for that.
If she improves, once the vomiting has definitely stopped (6 hours) try her on a small easily digestible meal (boiled chicken/boiled rice is good). Revert to her normal diet as she improves.
If she is not responding and seems to be unwell, then you will have to seek veterinary attention.
I hope I have been of assistance.
Kindest regards, Peter