No idea what type of meat it is. It's brown and spicy and spins on a stick.
Last donair I had in Halifax was 20 years ago. In St. John's... to be honest, probably near the same. I've been a pescatarian for a while now and a foodie before that (I still eat lots of cheap, dirty food, of course, just donair has never been a pleasurable fave of mine). I have, however, had donair sauce in both cities quite recently (we get it with cheese bread here, and you can buy it if you're so inclined at the grocery in squeeze bottles like ketchup, mayo, etc.). The HFX one was like a garlic salad dressing, ours is like donut glaze icing with a hint of garlic. It's sickly sweet. I have no idea if that's restaurant-based or regional beyond ours always being very sweet definitely being universal at restaurants here. Whether what we got in HFX is universal at their restaurants, I don't know, but you'd
never get that here if you ordered donair sauce.
Our understanding of it here is that it's just Lebanese. To the extent anyone associates it with Halifax here, it would just be in terms of popularizing/liking it. It's similar to "kitchen party". Very few people here would be aware the Maritimes even claim it, fewer still would ever use the term "kitchen party", we just do it. That's how it is with donair here. It's at pizzerias, throughout the province, in rural malls and urban strip malls, with pictures of Lebanon on the walls. And you can get a less-tasty version at all the big pizza chains.