Why is my dog acting strange, shaking, not eating, and withdrawn?

It's very hard to say what could be going on with her from that information. Shivering can be caused by low body temperature, pain (for example neck pain), it can actually be tremors, and somewhere's we don't figure out what's going on at all. Because it's been going on all night, I would recommend taking her to the vet this morning. Hope you get to the bottom of things today and Zoey is feeling better soon!

Shivering can be a sign of pain, nausea, or a fever. Muscle tremors can look like shivering and can occur with some toxins or neurologic diseases. If the shivering continues I'd recommend having Zoey examined by a veterinarian.

This sounds like she may have a severe injury or balance problem. I strongly recommend an urgent vet check to identify and treat the source of her pain and discomfort as these are not normal behaviors

These symptoms could have a wide range of causes, including fear, anxiety, pain, nausea, diarrhea, organ failure, etc. I would recommend watching Loki for the next 12-24 hours. If additional symptoms develop, if she isn't back to normal tomorrow, or if you are concerned she is getting rapidly worse, she should definitely get examined by a vet.

It sounds as your pet is suffering from a gastrointestinal condition, possibly an infection. it could also be due to ingestion of a foreign body material. i would recommend taking him to the vet urgently, he will need to be checked first, if the vet thinks it's a simple gastrointestinal infection he will need an anti vomiting injection, antibiotics and a special food for a few days in order to get better. . if the vet thinks it is more serious he will need a blood test and possibly an ultrasound in order to find out what is wrong.

If this is unusual behavior for your dog I would be concerned that there's something wrong. Shaking and lethargy can be indicative of pain, anxiety or that the pet just isn't feeling well. I would recommend that you take her to be seen by your regular veterinarian. A thorough examination will help determine what may be wrong and how to make her feel better

These are very unspecific signs of being unwell. You can observe her for a while, fast her for 24 hours and then offer her some boiled white rice and boiled white boneless chicken. If she has a tummy ache this should clear that up. If you suspect that she is in pain somewhere else of if she is deteriorating and or getting lethargic, you need to take her to a veterinarian for an exam.