Thanks to Islam Q&A we now know if it is OK to feed pork to cats. All you Muslim cat owners can let out your breath.
The tins of cat food include pork. Is it permissible to buy them for cats?
Praise be to Allaah. We put this question to Shaykh Muhammad ibn Saalih al-‘Uthaymeen, may Allaah preserve him, who answered as follows:
If you buy the tins, then it is not permissible, because it is not permissible to pay for pork and buy it. But if a person finds it by chance and feeds it to his cat, then there is nothing wrong with that. And Allaah knows best.
Shaykh Muhammad ibn Saalih al-‘Uthaymeen