At 5-6 months of age, she should have finished her puppy series by now. One round of vaccines leaves a heavy concern for Parvo, distemper, etc. with the avoidance of eating and drinking, fever, enlarged lymph nodes, etc. Please do not administer any additional vaccines now. She does need to be healthy and feeling well before any additional vaccines are given.
Considering her age, symptoms and vaccine history, she would do best being examined and treated by your vet today. Failing this, I can give you some steps to take at home to help your companion’s stomach feel better. However, if you do not see a marked improvement from your pet or you see worsening of symptoms, they absolutely must be examined by a veterinarian.
It often helps to give something to calm the stomach and a bland diet with higher fiber. This can help to reduce the instance of nausea/vomiting, restore/improve the appetite, avoid or address changes in the stool, help to move ingested items through the GI tract, etc.
The first step is to administer a dose of regular pepcid (famotidine) every 12-24 hours. You will want to give 0.5mg/pound of body weight (a 10# ***** would receive 5mg, a 5# ***** would receive 2.5mg, etc). For this, you can visit any human pharmacy and buy the OTC brand name Pepcid, or you can use the cheaper, off-brand “famotidine” that’s available. Either will be useful. For pets avoiding taking medication readily, you will likely need to using a pilling technique like this one: https://www.youtube.com/watch?v=-P6NfbxeLX0
2 hours following a dose of famotidine, the time needed for the medication to begin working, you can offer a bland diet. To make this, you’ll combine white or brown rice, boneless, skinless chicken breast and sufficient water for cooking in a stock pot. Boil on medium until it turns to mush and the breast is easily flaked. To avoid more nausea, start with small amounts to begin with and offer the amount every 2-4 hours. A few teaspoons to start is typically sufficient and you can work your way up every 2-4 hours in incremental increases until you’re sure no vomiting will be seen. If your companion requires a more palatable food, try adding in pureed baby food in chicken, turkey and similar flavors. Avoid those that contain onion or garlic in the ingredient panel. Work up to feeding exclusively until at least 3 days following the resolution of the GI upset. After this, work on slowly switching back to the regular food that your companion typically eats.
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