I've leveled a huge Meadows coastal stretch of land to sea level (this I assume helps me drag the serpent onto shore). This stretch of land digs deep into a mountain that rises to the mountain biome, this provides me with natural boundaries that keep my 2 star wolves relatively confined to this muddy beach. Necks constantly spawn providing ample food for the wolves. I drag the serpents onto the shore and the wolves make quick work of them.

Screen shot of my set up:

https://steamcommunity.com/sharedfiles/filedetails/?id=2575388205