Whether you find it amusing or frustrating - or a little of both - the fact is if you own a cat, they are going to knock objects off any elevated surface, such as your desk or a table. Are they simply trying to be annoying, or is there a reason for this behavior? Dog people will use this as an example of how cats are not intelligent and a reason not to like them.

FeLV is a retrovirus that infects cats and is responsible for more deaths than any other organism. It is, unfortunately, not uncommon. FeLV is highly contagious and is easily spread once a cat has been in close contact with another infected cat. Kittens and immune-compromised cats are more susceptible to the disease. Cats can contract the virus through saliva, urine, using the same litter box, nursing, and cat bites.