I'm just very worried. I feel as if I am a bad owner because I can't communicate with my pet.

I have a 4 year old male tabby (Mark) and he is very very friendly, even to stangers. He and my female kitten (Sammy) get along, I often hear them running around down stairs playing.

Sammy is not spayed yet. I was told you should spay your cats when they are 2 years old. Mark is nutered.