Why not just have TFP add chicken coops and beehives? I mean they copy pretty much everything else from mods so might as well copy those too. Destroy a stump you get a random chance to get a queen bee that you can then use to make a beehive, for the chickens you'd just need a a few eggs and some wood/grass, can hijack the dew collector system to just produce eggs and honey instead of water. Maybe add these 2 new stations to the farming/seed magazines.
I play a mod called Project Z, and its basically vanilla with a whole ton of new content, most things have a improved version of it, and there is several new farming stations, also add's boss zombies, elite zombies, add's a passive skill system based on kills, EG kill X zombies with headshots gets you a bonus to zombies with headshots etc, has one for each weapon too. Has a project zomboid type trait system as well when each new game your char generates random positive/negative traits (I disabled this system myself in my local ver). The mod also is a pure XML mod, so only the server needs to have the mod for multiplayer as the server pushes all its xml's to the clients. It might even work on consoles as it uses no custom coding or models. Its basically what vanilla could be if TFP would start getting better at advancing the game forward instead of reguratating the same game systems over and over and usually making them worse than before they were touched.