I have seem to have lost?

i cant find my pet dragon any wherei took out his lungrisal so he wouldnt spit out fire he is not harmful hes a nice dragon he is black with red nails i have been feeding him lighters and matches but he seems to like propane alot better he has a nice dragon nest on top of a palm tree is there somthing wrong i did with him please help i want him back how do i catch him.