SAdly name tags dont work at all. I had 5 animals with name tags, It was waaayy below mob limit. The mobs still despawned. 1 was a horse, that was the only animal in the chunk. 2 sheeps with like 10 other sheeps, and another sheep farm which had like 15 other sheeps. Name tags dont work at all. The horse was in a town, doors locked, saddle protected (happytown)
~Once_upon