Why did you add the other animals, I quite clearly limited my question to just chickens. AND gave a clear reason why I thought that things might be a little different along with the other seed types allocated within this pack. If I was asking for a Vanilla Answer I would have gone to the Vanilla wiki or just go with already known knowledge cause I have been playing Minecraft since the PumpkinHalloween update...
I will ask again, trying to be a little clearer...
Will Chickens eat Potato Seeds, Carrot Seeds and so forth??? I ask cause I have only ever feed them Wheat seeds, but due to how farming works within this mod pack, wheat seeds are actually limited and have no clear way to make them en-mass like vanilla farming can give you.
This is the answer, they were just going out on a limb and telling you what the rest of the animals would eat. There are no changes from vanilla that I've found, and the chickens will only accept wheat seeds for breeding purposes.
If you are having issues getting wheat seeds, it's quite easy to get more. Crop an entire 9x9 field, plant one seed, and leave it alone for awhile. With a 10/10/10 seed, there's really no need to move past Bread as a food, so you shouldn't need to be breeding chickens for food or the like, and you quickly run out of the need to have them around.
If the one 9x9 field isn't enough, make 2 or 3 of them. Honestly, the seeds are more important for Botania in my eyes, and I've got 2x of the 9x9 fields for that purpose.