alright so a dino should be able to see the feeder if its within six blocks of them, but it seems that they will only eat from the feeders if it isn't blocked by any foliage, that the feeder is within 6 blocks of them, and that the feeder AND the path to the feeder is on the same y-level as their head. otherwise, the dinos just wont ever eat from it. this seems like an issue that needs to be solved.

seen as the next update will likely be in a version past the village and pillage update, this issue could easily be fixed with programming the dinos to search for the feeders just like the villagers search for beds or workstations.