Why is my cat so needy and whiny? Written by Russel in A Why is my cat so needy and whiny? Lack of early nurturing could cause neediness in cats. Separation anxiety may also cause a cat to be too clingy and whiny. Consult a vet on possible ways to train your cat out of this behavior. Russel A pet owner who loves to share useful facts and information about animals. For now, I write mostly about dogs and cats.