Hi, I have today paid a deposit for a 3rd chi. But now worried that I have done the wrong thing. He is the smallest in the litter, half the size of the biggest. But he was playing happily with the others and didn't seem submissive at all. Looked healthy enough. He is 5 wks old tomorrow and about the size of my hand. Have I made a mistake? I know smaller chis sometimes have health problems. Has anyone else had the smallest in the litter?