Please do NOT feed Grapes or Raisins, they CAN KILL
First you need to get the Bile Acid Test results and post them here for us. Second, I would wait on the Ultrasound. The U/S is only about 60% accurate. To spend $400 on that with no guarantee, I'd want to spend it on a test that's better. But we need to know the BAT results.
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DogLiverDisease : Dog Liver Disease