Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you today. I do apologize that your question was not answered before.Different experts come online at various times; I just came online, read about your situation, and wanted to help.
Again I do apologize that my colleagues could not aid you sooner. If you would still like assistance, can you tell me:
When did Goldie last pass stool? Are you seeing her strain?
How long has she been eating these grapes? When was the last time?
Has she been drinking more? Passing more or watery urine?
Has she been showing any retching, gagging, lip licking, drooling, or vomiting?
Are her gums nice and pink (notwhite/pale)? Moist or sticky?
If you press on her belly, does she have any tensing, tenderness, discomfort, or pain?
Could she have eaten anything else she should not have (ie bones, stones, socks, toys, plants, chemicals, human meds, etc)?