Alex, interesting stuff - I'm not sure exactly what we are arguing about (if we are arguing?) and I can assure I have dfficulty killing an ant (can only do it if I dont get the chance to think about it first), and I would never poison anyone's cat (even though I admit I have felt like doing it during a period when my place became the local cat toilet - fortunately they now must have found another toilet, or perhaps their behaviour has changed and they have improved their disposal methods:)
I admire your stance regarding vegetarianism and animal rights.
I choose not to own any animals, mainly because I am very aware of the responsibility. Also, FWIW, I have been pescatarian for over 20 years, but have not made the full move to vegetarianisim, or even better veganism, because it would have made things too difficult in the household - the step to pescatarian was extreme enough in the view of my partner!

Joy, please try to take full responsibity for your cat :)