I recently adopted two male brother chins from a pet store. They are both six months old. I originally purchased the first one and then after two days got the second one as I thought it would be better for the both of them. The first one is Niko aa timid but super friendly chin and the second is loki a more adventerous and mischivious chin. Loki has started to blossom into a fun energetic curious chin while Niko seems to want to hide away in the cage and not come out to run and play when it is time. I was wondering if its possible loki is being dominant, or maybe niko suddenly doesnt trust me? Either way I just want niko to come out of his shell like his brother because he was on his way to being even more people friendly but now he hides away in his spot in the cage and would rather stay then come out. What do I do?!?!