Hi,

I could not feed chickens the GM chicken feed in multiplayer, so I tested it in single player and here's the result:
I managed to get some witch eggs by making some chickens explode, but when I named my lab witch and took its DNA, the DNA seeds no longer produced any egg. The chickens did continue to explode though.

I could not feed a chicken with either the named or unamed GM feed, but that's probably a serverside issue.

I'm using FTB Beyond 1.1.0 (MGU 0.1.8.16)

Named mobs among other mobs like variants are not currently supported - will be added in a future version.