In the dev environment at least I am unable to get any seeds from the grass. I am starting in creative and then switch to survival to make it so that i can make sure that i have grass. when i brake about a small to medium size island, and is is in multiple worlds, I am unable to get any seeds. I am not sure if this is a bug in minecraft or a bug in Forge.
Thanks for the time to read this, Hope this is a bug, and hope that it is not at the same time.
TheRealM18