He is still not eating and it has been well over 24 hours at this point. He vomited a couple times yesterday and has not vomited since. He ate a new food and vomited afterwards. He did not ingest anything toxic or that could cause a blockage. Biggest concern now is lethargy, constant sleeping and no appetite.
Thank you for providing a more detailed explanation than before.
The white and foamy vomit could indicate an empty stomach or mild irritation. Lack of appetite is a very non-specific symptom that can occur in wide range of diseases, so diagnostic tests chosen by a veterinarian who checked him directly are necessary to identify the cause.
And, even if cats do not eat for at least 48 hours, they will develop fatal liver damage (hepatic lipidosis).
So, ensure Dill stays well-hydrated by offering fresh water frequently. You might also consider giving a small amount of low-sodium chicken broth to encourage drinking.
In terms of diet, it might be beneficial to temporarily switch back to a bland diet. Offering small amounts of boiled chicken or turkey (without skin or bones) mixed with plain white rice can be gentler on his stomach.
It's also important to allow Dill to rest in a quiet and comfortable space, as lethargy can sometimes be the body's way of recovering.
Since he is on Cerenia, an anti-nausea medication, and the vomiting has stopped, that's a positive sign. However, if the lethargy and lack of appetite persist, or if new symptoms appear, seeking veterinary care would be the best course of action to rule out any underlying issues.
If you have any further questions, please feel free to ask. Thank you.
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Even with the Cerenia he seems to still be nauseous. We have tried offering boiled chicken and Purina HydraCare with no success.
Persistent nausea and a lack of appetite can sometimes signal an underlying issue that requires further investigation.
Given that your cat hasn't eaten for over 24 hours and is showing signs of lethargy, it's crucial to address this promptly to prevent complications like hepatic lipidosis, which can occur in cats who don't eat for extended periods.