I have a trio too! Their colors full and fade a bit with age. And I had a"runt" as well. He wouldn't eat in front of me at all. The others would though do I became concerned. About a month, maybe more he grew alot and got so bold. He now has found his own hide spot for the day and comes out to eat. Still won't with me watching lol
Is he still alert and active at night? I was told to check how clear his eyes are as well. To make sure they were not cloudy.
I think he will be fine.
Ps it did take my milks a little bit to adjust to the food bowl. I use a little rubbermaid container for a lunchbox that's divided into thirds. 1/3 & 2/3. The littlest is lsat to arrive and ends up with his own slot.
I hope this is helpful.
, garrett