She is just sleeping /dozing , wont go outside and hasn't eaten or drank anything. She doesn't appear to have been to the toilet either. She hasn't been sick or anything but it's just extremely out of character and I am a little alarmed.

Take her to the vets for a check-up & it will put your mind to rest if nothing else.

Please take her to the vets when cats act out of character it means there is something bothering them, she may have eaten something she shouldn't have, you don't say how old she is.
Hope she's ok
good luck

Take her to the vets.

A similar thing happened to my cat earlier in the year and she became very dehydrated, which is dangerous for them, and she ended up spending three days on a drip at the vets. She also went completely off her food and had to be coaxed back into the eating habit - she was hand-fed for about a week. Thankfully she recovered.

They can go downhill very quickly if they don't get fluids and food.

Thanks guys, i'm taking her to the vet today. She's 3 by the way.

Are her 'third eyelids' showing?

Both my Cats are similar.... but I am wondering if the change is season is the reason for it

Usually they are jumping all over me at the crack of dawn yowling to be fed, but now when I get up and put their food down they just sniff it and turn away. They will eat it eventually, but they used to demand to be fed first thing!

Both of them seem to be sleeping more but when they are "up" they a running around as normal.

Its just very worrying that they both seem "out of sorts"

One of them is due his jabs this week so I am going to ask the vet what they think