How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dr. B. Your Own Question
Dr. B.
Dr. B., Cat Veterinarian
Category: Cat Veterinary
Satisfied Customers: 20925
Experience:  Small animal veterinarian with a special interest in cats, happy to discuss any questions you have.
Type Your Cat Veterinary Question Here...
Dr. B. is online now
A new question is answered every 9 seconds

My cat is vomiting yellow bile. He hasnt eaten or had

Customer Question

My cat is vomiting yellow bile. He hasnt eaten or had anything to drink in a day or so. Loud moaning every so often.
JA: I'm sorry to hear that. The Veterinarian will know if your cat will be able to digest that. What is the cat's name and age?
Customer: Smokey, 9
JA: Is there anything else important you think the Veterinarian should know about smokey?
Customer: Chronic urinary crystals
Submitted: 8 months ago.
Category: Cat Veterinary
Expert:  Dr. B. replied 8 months ago.

Hello & welcome, I am Dr. B, a licensed veterinarian and I would like to help you with your wee one today.

Can you confirm he can pass urine? Any straining?

If you press on his belly, any discomfort, tenderness, or tensing?

Are his gums pink or pale/white? Moist or sticky?

Could he have eaten something he should not have (ie bones, toys, plants, chemicals, etc)?

Any diarrhea?

Customer: replied 8 months ago.
He has no passed urine, his feces was dry and small the last time he went yesterday. He has had a hard time going for the past few days. This usually passes. Pale sticky gums and skin. Very tense abdomen.
Customer: replied 8 months ago.
Also, he is an indoor outdoor cat so he has access to lots of things. He recently got stitches for a large cut on his arm pit area, and were removed after 2 weeks. That was a week and a half ago. Also new dog in house and new food
Expert:  Dr. B. replied 8 months ago.

Oh dear,

I have to say that I am quite worried about your lad.

Appetite loss and vomiting in cats can be caused by a range of reasons. They can be primary ones (ie gut upset, pancreatitis, foreign bodies), but in Smokey's case I am concerned that this is just a side effect of a bigger issue. It is possible that constipation is causing this but if he hasn't passed urine and a tense belly, this rings alarm bells of a urinary blockage. And if his gums are pale (sticky just means dehydration), there is concern of anemia (low red blood cell volume) as well.

So, if we are sure he has passed no urine, we need him seen right away. Especially as this progresses we can see this worsen to lethargy, collapse and if the urinary toxins leak back into the blood it could slow and stop their heart (and be fatal) if not unblocked and emptied immediately. Therefore, in this case, I must say that it would be ideal to have him seen immediately (either by his vet or ER one if no one is open just now). We'd want them to feel his bladder +/- express it to determine if there is a blockage. If there is, this needs to be addressed immediately. Otherwise, if that can be excluded, then we need anemia checked for and to get him onto some kitty safe pain relief and anti-nausea medication to settle him.

In this situation, it would be prudent to get your wee one to the emergency vet. To find your local ER veterinary clinic, you can check @ or

Kind regards,

Dr. B.


If you have any other questions, please ask me – I’ll be happy to respond.

**Please rate me by clicking on the **stars** at the top of the page as this is the only way the site credits me for helping you. Thank you!: )

Customer: replied 8 months ago.
Unfortunately this is why i contacted you. I have spent over $3000 on this in the past and cannot pay for assistance this time. I have buprenex from a past trip. Can i administer this? Anything else i can do?
Expert:  Dr. B. replied 8 months ago.

Hello again,

You can administer the Buprenex for pain but you need to keep an eagle eye on his urination. If he cannot urinate, then we are in a dangerous situation that could be fatal for him. So, you may need to see if the local vet can at least provide emergency care and bill you, help you secure Care Credit (LINK), or if regular non-ER vets are open check for your local VCA or Banfield as they offer a free first consult (You can find vouchers for this via VCA: ( & Banfield : ( Else we may need to tap into the charities to help him. For that, you could consider checking out the Humane Society's database ( or ASPCA’s database ( Both have a lot of branches nationwide, along with ties to other assistance organizations that can keep down costs and surely will be willing to help.

Otherwise, if he does urinate, then you can at least try to counter the nausea causing his vomiting with an OTC pet safe antacid [ie Pepcid (More Info/Dose @ And if we can get him settled, you can try tempting him with a light diet like boiled chicken, boiled white fish, scrambled eggs, or meat baby food (garlic/onion free only). But again if he cannot pass urine, we need him seen as soon as possible to prevent this causing permanent kidney damage or getting to a life threatening point.

Please take care,

Dr. B.

Expert:  Dr. B. replied 8 months ago.

I'm just following up on our conversation about your pet. How is everything going?

Dr. B.