Yesterday, I made a Pen, spawned 2 Lox and dropped 50 Cloudberries. But they didn't eat. After a few minutes I went about my day of building, and came back 3 hrs later. They were Tame and "Hungry" but didn't touch the food. I gathered the old and spawned new. Nothing.
2 more hrs later I checked on them and still not eating. So I thought tomorrow is another day. After and hour so hovering over them, still not eating, I though perhaps the Pen was too small. So I made it bigger. After another hour, I started with 2 new Lox. Still won't eat. The Boar I spawned and tamed the previous day were making Piggies and happy. But these Lox...nothing(. Maybe the Pen is too shallow? It's 8 m tall, but I'm out of ideas on what could be wrong. Any suggestions?