Do your cat have any underlying sickness which you have been managing over a while? If you're not sure, I would suggest you go and run a full scan and tests to make sure everything is well with her.
This can turn out to be nothing serious, but there is no harm in finding out. If my cat was active and it suddenly became dull this is what I will do.The cat's health is compromised. I would suggest taking it to the vet immediately and find out exactly what is wrong.
The new cat is still adjusting and adapting to his new environment. Give it time, I'm sure he will definitely come around.I got another cat with Olive some weeks ago. But he does not have the drive and energy that Olive has. I don't even know what to name him yet, and he is not even active.
What is the cause of the dullness, and how can I get him to lighten up?