Cats can indeed feel lonely or depressed if left alone at home, especially if they are used to interacting with humans or other pets. Cats are social animals, and while they may not require as much constant attention and companionship as dogs, they still need a certain level of social interaction and stimulation to maintain their physical and mental well-being.

Cats that spend long periods alone may exhibit signs of depression, including decreased appetite, reduced activity, excessive grooming, and hiding from or avoiding human interaction. Furthermore, a lack of appropriate stimulation can lead to behavioral problems such as aggression or excessive vocalization.