Once the farm has been established for a while the two small pens are probably not used as much. This is probably more complex than is practical, but it would be nice if the two small pens could be combined into a more useful medium or large pen. Reworking the two pens would probably be rather resource expensive, but would allow players to more effectively utilize the farm space. Converting back would be equally expensive, but would make the utilizing the farm more interesting.
Valotharsaid: two small pens are probably not used as much. Hilarious.
Chins are faster for earning beans than dragons. Selling adols, chins are 0.49 beans/min while dragons are 0.39/min. For xp, chins are lower than both zygo and dragons, but not by much (714 xp/h vs 952 xp/h and 1190 xp/h). However, you can have 4 babies per pen at a time vs 2 in medium and 1 in large.
That may be true, but I am not interested in maxing out my bean production. I want to sell unchecked items. So depending on what I want to sell at the time, being able to reconfigure the "unused" pens would help.