Bacterial infections, viral illnesses, and parasitic infections can cause a cat to become weak and tired. ... Dehydration can make a cat feel tired ...
Cats with FeLV often stop grooming themselves because they feel too unwell, or the illness makes their coat greasy, dull, and matted.


Furthermore, visual representations like the one above help us fully grasp the concept of Reasons Cats With Leukemia Feel Tired.