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Why is my dog still vomiting and has bloody diarrhea after a month?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Large (61lb +) | Male | neutered | 7 years and 4 months old | 65 lbs

Took dog to vet a month ago because of loose stool and vomiting. They took x ray and said whatever the mass is has passed through stomach and we’re just waiting for him to poop out. Well it’s been a month and still diarrhea with some blood and vomiting sometimes twice a day. Yesterday’s vomit had thick blood almost like bile (which has happened before but was yellow). He’s still down to eat and play. But constant loose stool and it seems like he can’t get whatever’s in there out by trying to poo

1 Answer

Most Helpful Answer

Linda G,  MS, DVM

Answered By Linda G, MS, DVM

Veterinarian

Published on March 17th, 2020

Hello. This is just not normal. I can not imagine telling any client that waiting for something to take a month to pass is in any way normal. You really need a second opinion on this. Mac needs a fecal analysis, & not just one done in a vet's office. It needs to be sent to a laboratory for a diarrhea panel. If nothing is found, the abdomen should be ultrasounded for the presence of anything abnormal, & biopsies obtained if anything suspicious is seen. Chronic vomiting & diarrhea needs to be addressed, but only after a proper diagnosis is made. At the very least, I would have Mac on a bland diet of 75% whole grain white rice ( not instant or minute rice ) & 25% white meat chicken. I would also start him on Proviable KP, a combination of a dog friendly Kaolin & pectin plus a high level of probiotics. This alone, will not cure his problem, but that much blood in the diarrhea is very concerning. Please try to find an internal medicine specialist, although I see you are in Hawaii, so I am not sure what might be available in your area. But you do need to either follow up with your vet, or ask for a referral to a specialist. Good luck & thanks for using Petco Pet Education Center, formerly Petcoach.
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