Yes that is correct, giant bulls…
So, for quick reference:
Numbers 33:23
And Moses gave unto them, even to the children of Gad, and to the children of Reuben, and unto half the tribe of Manasseh the son of Joseph, the kingdom of Sihon king of the Amorites, and the kingdom of Og king of Bashan
Deuteronomy 4:47
And they possessed his land, and the land of Og king of Bashan, two kings of the Amorites
Amos 2:9
9 “Yet think of all I did for them! I cleared the land of the Amorites before them—the Amorites, as tall as cedar trees, and strong as oaks! But I lopped off their fruit and cut their roots.
And now, giant bulls:
Psalms 22:12
12 I am surrounded by fearsome enemies, strong as the giant bulls from Bashan. 13 They come at me with open jaws, like roaring lions attacking their prey.