Since I have not heard back from you, I do want to leave my thoughts on what you have told me so far about Casper. If you are able to answer those questions I asked when you return that would be grand but I do hope my thoughts will shed some light on his situation and what you can do to help him.
Now if the vomiting is intermittent, then I do think it is a side effect of his throat being inflamed alongside those respiratory signs. This is not uncommon to see when our cats have contracted an upper respiratory tract infection. Just to note, other signs we can see include sneezing, congestion, watery eyes,nasal discharge, lethargy, drooling (as the viruses can cause oral ulcers),sleeping more, and sometimes inappetence. (Really its like when we have flu).
To start, if the nausea is not frequent, then we’d want to focus on his respiratory signs as these will likely settle once we address the primary issue. Still, if he is nauseous or struggling, you can consider trying him an antacid. Examples of those OTC antacids that we commonly use in cats include:
*Pepcid (More Info/Dose @http://www.petplace.com/article/drug-library/library/over-the-counter/famotidine-pepcid)
*Zantac (More Info/Dose @ http://www.petplace.com/article/drug-library/library/over-the-counter/ranitidine-hcl-zantac)
*Tagamet (More Info/Dose Here @ http://www.petplace.com/article/drug-library/library/over-the-counter/cimetidine-hcl-tagamet)
Whichever you choose, we tend to offer these 20 minutes before food. And just to note if we did see a decline in his appetite, then I would note that warming the food or offering smelly wet foods can be of benefit here. This is because congested kitties that cannot smell their food often won’t eat as well as they should.
Now we need tackle those flu signs. To start, if you are seeing snotty discharge,then that is a clue that bacteria are present and antibiotics would be indicated. Otherwise, supportive care will be the mainstay of our treatment for him.
If he is sneezing and congested you can take him in the bathroom while you run a hot shower. The steam will help loosen and clear some of the snot congesting him. You can also use a baby nebulizer, but often cats don’t like things held up to their faces (but you can often make little ‘steam tents’ with Casper in his carrier with these and a sheet).
Furthermore,if he is building up mucus that the steam isn't shifting, you can use a cotton ball moistened with warm water to wipe away crust and mucus. As well, you can use saline nasal drops like Ocean Mist or Little Noses (but not anything medicated) to further reduce discharge build up. To do so, just tilt his head back and drop 2-3 drops in one nostril. Cats hate this, but it helps. After the drops go down, you can let the head up and wipe away any discharge that gets loosened. Then repeat with the other nostril.
Finally,since herpes is a concern with these signs, I would note that you could consider supplementing him with L-lysine. This is a nutritional supplement that can help them recover quicker. This is available over the counter as a gel or powder at most pet stores, vets, and even online. An average cat dose is 500mga day and this can be mixed into food to dose.
Overall, Casper's signs are most suggestive of a respiratory infection that is causing some vomiting due to irritation in the throat. Therefore, we'd want to use the above to soothe his signs. Of course, any snotty discharge or increase in his vomiting, then we'd want to have a check with his local vet. They will be able to start him on antibiotics +/- kitty safe decongestants to soothe his signs and get him back on track.
I hope this information is helpful.
If you need any additional information, do not hesitate to ask!
All the best,
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