Usually kilayin is cooked with pork innards such as pork lungs and pork liver. I have a kilayin version which have that ingredient on my other blog post but since pork lungs is not always safe to eat because sometimes is contains parasites or worms and it needs an experienced cook to clean and wash the lungs, it is omitted in this version of kilayin. So I think it is safe just to use pork liver for the innards.