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Good evening. Without further information it is tricky for me to provide the best answer but I will try my best to offer some useful advice. Please do feel free to respond with any updates or further questions and we can continue the conversation.
Vomiting and whining is not uncommon in a young dog and can have a number of causes including a viral infection, eating something they shouldn't, a gut obstruction, parasites etc.
I would want to ensure her abdomen is not bloated and her gums are pink and wert.
To settle her stomach, bland, small meals of chicken and rice mixed with warm water can be offered. I would also ensure she is up to date with a good quality wormer such as panacur. Check both the home and garden for any potential toxins such as rat bait or lawn feed.
It would be important to verify the ear infection has resolved as an inner ear infection could potentially cause dizziness which could lead to nausea and vomiting.