Hello, my name is***** and I have over 20 years of experience as a veterinarian. I am very sorry to hear about Ivy's intermittent vomiting for the past 3 days.
Vomiting/retching can be from several causes. Common ones are a quick change in diet, too many treats, especially fatty or spicy treats, eatings things they should not such as things found in the yard, toy pieces or garbage, viral or bacterial or parasitic infections.
More serious causes include chronic pancreatitis, a dietary allergy or sensitivity, inflammatory bowel disease, internal organ failure (kidney or liver disease), a full or partial gastrointestinal obstruction or even infiltrative cancers such as lymphoma.
I understand that so far her blood, urine and stool checks have come back relatively normal and she is eating a bland diet, yet continues to vomit. That means that an infection, pancreatitis, kidney or liver disease, or diabetes are less likely.
I think it is wise to have her rechecked tomorrow to proceed with further testing. I would be suspicious of inflammatory bowel disease, infiltrative intestinal or stomach cancer, or a mass in her abdomen compressing her gastrointestinal tract. An abdominal ultrasound seems like a reasonable next step.
At this point we can try some things to settle her stomach today. You can give either:
1) Pepcid-ac (famotidine) at a dose of one 10mg tablet per 20 to 40 pounds of body weightevery 12 hours.
2) Prilosec (omeprazole) at a dose of one 20mg tablet per 40 to 80 pounds of body weight
every 24 hours.
These will reduce stomach acid and should help if this is related to simple nausea and gastrointestinal irritation. They can be used for several days if necessary.
A couple hours after giving her one of the acid reducers I would feed her a bland diet gruel, mixing her prescribed bland diet with warm water, pedialyte or broth and blenderizing it to see if she can keep that down.
If things are going well with feeding the gruel and the acid reducers then perhaps tomorrow add less water/broth and see if she can hold that down, gradually increasing solids and decreasing the liquid part. Feed several small meals a day. Once she feels better (no vomiting for 48 to 72 hours) start mixing in her regular dog food very slowly. Less bland more regular with each day. It should take a week or so to convert her back.
If Ivy is continuing to vomit and is feeling poorly though, then it would be best that she see her veterinarian tomorrow as planned as if she continues to vomit that will worsen her dehydration.
If she has a tense painful abdomen, becomes very lethargic, begins vomiting profusely, or runs a fever greater than 103.5F then she really must be seen by a veterinarian as soon as possible.
Best of luck with your pup, please let me know should you have any further questions.