...Hunting dogs???

Looking at the patch notes for 5.8 beta

Hunting dogs effect no longer appears in games with starting ages later than Dark.

I remember this being in AoM. Not in this?

According to the wiki, it was introduced then removed:

It was available to all civilizations in the Dark Age. When Forgotten Empires was first released Magyars had this research free, but in patch 1.1 this bonus was taken away. As of patch 2.2, Hunting Dogs was removed from the tech tree.

http://ageofforgottenempires.wikia.com/wiki/Hunting_Dogs

It's weird to see it in the patch notes seeing a change made to it.