How about taking your cat to the vet if you think something's wrong? Be a responsible pet owner. We have no idea what's wrong with it.
I'm pretty sure the cats are asking the same question about us. :)
All cats are CRAZY. Just watch one.
Ok see it. My point exactly. 😾
Does it matter if she is? Does this suddenly mean you will take her back to the pet store or to the street? Poor kitty!
As with any animal there are varying degrees of intelligence. If you are concerned for your cat then take it to the vet for an evaluation.
Now for the something for you to take into future consideration. Using the word retarded is considered rude. The more acceptable word choices are slow, mentally challenged, or mentally disabled. Please use one of those options in the future. Otherwise you will appear either uneducated or cruel.