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She might have a touch of Megaesophagus. With this condition, food fails to move all the way down into the stomach and is frequently regurgitated. This condition is found in dobermans. You can read about this here:
This site give a good description of what happens to a dog with this condition.
It will help if you can keep her front elevated for 10-15 minutes after eating as well as when she is eating if she does have this condition. That is one thing that can help. You should also experiment with different consistencies of food. Some do better with almost a liquid consistency and others a semi liquid or softened food. Feeding a high calorie diet in small portions throughout the day is also recommended. Perhaps supplement with Nutrical would help as well.
There are a few different drugs that may be effective. One is Metoclopramide which you can read about here:
Another drug is Cisapride, you may want to ask your vet whether these drugs would help in your dog's particular case.
It is worth investigating this possibility. I would also add a probiotic to her food in order to facilitate good bacteria in the stomach and aid in digestion. Fortiflora is a good choice and can usually be found at your pet store or vet office.
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