My cat can't walk or stand. Why isn't his URI treatment working?

Since there are still symptoms of the infection then he needs to be rechecked for further treatment. Some cats need pulse therapy medicine to help keep it under control. Also a lot of upper respiratory infections in cats are viral induced and take time to fully resolve. They do make anti virals you can add to the food to help clear the infection also

This is likely due to an upper respiratory infection. These are often due to a virus that is usually self-limiting (will go away on its own - much like a cold with people). These can become worse and complicated with bacterial infections and it sounds like Kubusz has a rather severe infection. It's definitely good that the vet is coming to make an accurate diagnosis and treatment plan. For now, make sure he is comfortable and free of any stressful situations. These infections often happen in times of stress, so if there are new stressors in the environment, then try your best to remove them. You can help relieve congestion by giving a steam bath at home. Below is a link to an article that explains this and has helpful info about cat upper respiratory disease. http://www.wikihow.com/Help-Your-Cat-Breathe-Easier I hope that helps and Kubusz gets better soon.

Thank you for submitting your question regarding Pluto. He will need to see his veterinarian again as it does not sound like he is improving. He may require a different antibiotic or a longer course. He is so young, it is easy for him to get dehydrated. He may be given fluids as well. In the meantime, keep his eyes clear of discharge and encourage him to eat and drink as best you can. I hope this information helps!

Poor Sourpatch! You typically should start to see some improvement within 24-48 hours, but it can be longer based on the severity of the infection. He likely isn't using the litter box because he hasn't eaten or drank, so he has no need to pass anything. When cats have a respiratory infection, they can't smell their food. Smell is very important to cats, and they won't eat something if they can't smell it. To tempt him to eat, I would gently warm up really smelly wet food, such as sardine or fished based. That will get some moisture in him as well, and hopefully he will start eating soon. If he still isn't eating after trying this in another 24 hours, I would take him back into the vet.

I'm not sure what is causing it either, it's probably not related to the upper respiratory infection or to the treatment though. you will need to take him back to the vet so he can be physically checked for this new condition.

Unfortunately, there are a lot of issues that can cause this, so a vet visit is best. Neurologic issues from birth, muscular or nerve issues in the body, illnesses, toxicities, etc are all potential causes that could cause a cat to not be able to walk, stand, or fall over. A full vet visit is a good idea to help figure out what the problem is and provide appropriate treatment.

That sounds like a really tough case. You may need to talk to your vet about advanced diagnostics such as MRI or CT scan, or a referral to a specialist. Has your vet done blood cultures? Checked fungal titers? Tick-transmitted diseases? You may also discuss supportive therapies with your vet, such as cold laser therapy or medical acupuncture.