[souffle]

Hi there - I have removed the photos as we do not allow pics of baby hamsters whose eyes are not yet open.
You have a little runt baby hamster there. There is nothing much you can do except making sure he has access to a plentiful supply of food and maybe offer him little bits individually. Sometimes they thrive well and catch up with their siblings by 6 months, sometimes they remain small and sometimes there is something wrong inside and they just pass away quite young. If there is a fault with the digestive system they tend to just fade away sadly. Offer him a teaspoon with baby food on just to ensure he gets plenty and doesn't have to fight at the food bowl. I sometimes leave runts with mum a little longer as well to see if that helps them grow on a bit.