Important PSA: Flamingos can be placed in the Brahmin pen hay bales. : r/fo76FilthyCasuals
Fallout 76 Brahmin Location | GameWatcher
Brahmin (Fallout 76) | Fallout Wiki | Fandom
How to get the Brahmin Pen plans in Fallout 76 - Gamepur
If you tame a Brahmin (for some reason), it will eat from the fertilizer station just like your other Brahmin. Also, it does not wander very far like other pets, I've learned. :