Several years ago, I wrote an article about cancers of the spleen, hemangiosarcoma. Hemangiosarcoma is a malignant vascular tumor that occurs in veins and large organs such as the spleen, heart and liver. In many cases patients with this cancer may not show any symptoms indicating they are not feeling well.
Ownerless cats may look the same, but there is a difference between a stray and feral cat. A feral cat is one that is born and raised in the wild with little or no human contact. A stray cat is one that has been abandoned or left from home and became lost. A stray cat is homeless but has already been habituated to humans.
There is no question that when cats scratch objects or even people it is not pleasant. But scratching is a normal behavior for cats and serves many purposes. Scratching serves to shorten and condition the claws, and more importantly, cats scratch to mark their territory.