Why is my cat suddenly so much more sleepy?

She has just turned 4, but has become more lethargic recently, spending pretty much all day asleep on the top level of her sctratching post, and only really gets down briefly to eat for a few minutes when I first put her food out in the morning. Also she seems ot have become less confident when getting down from high surfaces, going gradually to lower and lower levels, rathe than jumping straight donw as she used to. Is there something I should worry about and take her to a vet, or is she just getting older?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia��).