An allergic reaction in cats will present as an intense itch, usually of the skin. They can get hives, so you'll see little hairs puff up. That's really, really rare for us to see that, but that can happen. They might get swelling around their eyes or their face and usually like intense vomiting or diarrhea, so GI reactions. So that would be an intense allergic reaction.

Palliative care focuses on controlling pain, nausea, and any side effects from the cancer. It's also important to consider the impact on the human-animal bond. If medication is disrupting this bond or causing misery for the cat, it may be time to consider whether it's fair to continue. For any questions about end-of-life care, reach out to your veterinarian.

The quality of life is an important indicator. If your cat is no longer exhibiting behaviors that make them who they are and is instead constantly sleeping or hiding, it may be time to consider end-of-life decisions.

If your cat is not eating, is lethargic, or is experiencing side effects like sedation or decreased appetite, these could be signs that your cat is suffering from the treatment. It's important to report these symptoms to your veterinarian so adjustments can be made.

Currently, there's no preventative medicine for cancer in cats. While early detection and genetic screening are available in humans, these are not yet common in veterinary medicine.

Without treatment, the lifespan of a cat with cancer could be as short as weeks or days, particularly if it's a rapidly growing type of cancer. Changes in behavior such as hiding, lethargy, decreased appetite, or changes in usual habits are indicators of a decline in health.