Answer
Wa `alaykum As-Salamu wa Rahmatullahi wa Barakatuh
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
1- Buying pork and feeding it to Muslims or non-Muslims.is prohibited .
2- One who does that should repent to Allah and seek His forgiveness.
Answering your question, the Fatwa Center at Islam Q and A, states:
If a Muslim buys pork and feeds it to others, it is haram and there is no doubt concerning the prohibition on doing that.
Jabir ibn Abdullah (may Allah be pleased with) heard the Messenger of Allah (peace and blessings be upon him) say, on the day of the conquest, when he was in Makkah: “Allah and His Messenger have forbidden the sale of alcohol, dead meat, pork and idols.” (Al-Bukhari and Muslim)
Regardless of whether he feeds it to the People of the Book, or he feeds it to dogs, or does anything else with it, selling and buying pork is haram, and its price is also haram.
With regard to eating pork, that is also haram, and the prohibition thereon is well known from the Book of Allah, the Sunnah of His Messenger, and the consensus of the Muslims.
With regard to the one who does that, whether he does it only once or more than that, what he must do is repent sincerely to Allah, and seek His forgiveness for what he has done in the past, and he must never do such a thing again. He should not compromise for anyone with regard to the religion of Allah, or try to appease anyone or be kind to him by doing that which involves disobedience to the Most Gracious.
If he wants to offer food to anyone, Muslim or non-Muslim, he can give them food that is wholesome and halal, and he can give him to drink that which is wholesome and halal; he should not help him to disobey Allah and he himself should not disobey his Lord in order to offer food or drink to someone else.
Almighty Allah knows best.
Source: www.islamqa.info