Why is my cat throwing up white milky liquid? What should I do?

I recommend getting your cat seen by your vet or an emergency vet right away. Cats need to eat, if they go more than a few days without eating they can develop serious liver problems which can be fatal. Continuous vomiting for so many hours is very exhausting and dehydrating, so your kitten likely needs some medical intervention to get better. Your vet will do an exam, labwork, possibly x-rays, and based on these results, your vet will have a better idea what is going on and can better advise you about treatment options.

Your cat Felix is nauseated and trying to vomit. If this has been going on for some time, or if he is very lethargic and not himself, he may be very seriously ill. I recommend a vet visit right away for blood work and X-rays of his belly to see what is making him sick, and if he needs emergency supportive care like surgery and IV fluids.

I recommend having Kitten seen by his veterinarian based on the symptoms you are describing. He may just have some gastrointestinal upset but there is also the possibility for something more serious such as a foreign body.

Thank you for using Petco Pet Education Center, formerly Petcoach! It sounds like Mel is having chronic vomiting, increased thirst, but decreased appetite. Unfortunately, these signs are rather vague, and can be caused by a number of conditions including hair balls, intestinal parasites, inappropriate diet, and other more serious conditions such as certain cancers. I recommend having Mel seen by his vet to determine exactly what is going on. You can try feeding a bland diet at home, making sure he gets plenty of water, and grooming Mel to limit hair balls. I hope all is well!

You can see some vomiting after shots, and while it is concerning, it doesn't sound like a lot of vomiting. I can give you a home remedy to see if that helps Dexter. Withhold food tonight, then feed a bland diet of boiled white meat chicken (no bones) in small amounts several times a day for a couple of days. Then slowly add back in his normal diet. If the vomiting continues in the absence of food, he refuses to eat the bland diet, he vomits the bland diet, develops diarrhea, stops drinking water, starts vomiting water, or becomes very lethargic, he will need to see a vet right away.

Sorry to hear that Ryder isn’t feeling well! If he is hiding, seems painful, is having diarrhea or seems listless/lethargic, take him in. If his attitude is still seems good and the vomiting seems to be slowing down significantly this afternoon it is reasonable to monitor him, but if he does become lethargic, seems painful, is hiding, starts having diarrhea or if he continues to vomit into the evening, please take him in. If you are going to watch him at home, offer small amounts of water at a time frequently, and hold off food until tomorrow morning, unless he is a diabetic. If he does have diabetes, he should go in if he’s been vomiting all day. I hope that is helpful!

Poor Dexter! That is concerning that he won't eat and has been sleeping all day. If the vomiting and diarrhea has stopped then you could try to get him to eat a small amount of a bland diet. Try a little bit of boiled chicken and see if he will eat that. You could also syringe a little bit of water into his mouth to see if he will drink. If the lethargy, decreased appetite, vomiting, and/or diarrhea continues then he needs to be examined by a vet to determine the cause and treat. He may need some fluids to prevent dehydration and an anti-vomiting medication. Hope he feels better soon!