that will proberly be a Syrian Hamster or the Golden Hamster.
Syrian Hamsters have pouches, it does not matter how long their fur is.
By short hair hamster I assume you mean syrian. Syrians can only be kept alone. In pairs they will fight to the death. At pet stores you see them together because they are young. As they get older and establish territory they will fight.
they can be in hamster labor from 1/2 hour till around 3 hours thats vagly
If you have a short haired hamster you wouldn't have to deal with knots in the hair, a long haired hamster has long hair that you would have to brush everyday. I have a hamster with extremely long hair and i brush everyday. That what keeps knots out of the hair. It also makes it soft. DO NOT CUT ITS HAIR, unless it is used to your hand and will stay very still. If you have a short haired hamster you don't have to brush it as much. Use a soft tipped toothbrush when brushing the fur.
If your hamster has hair loss this could be a symptom of a disease or parasites.
In the stores they do have more than 2 in a cage. I would just be careful. I had a teddy bear hamster and added a short hair a while after and the teddy bear hamster chased the short hair around and eventually got used to them. Be careful though they may fight
By the time they open their eyes (around 7 to 10 days) they already have a coat of short hair, it gets thicker and longer as they grow.
If you have a short haired hamster like a Syrian then it cleans itself. If your hamster is long haired then you have to brush it depending on the length and thickness of its hair. Never bathe your hamster, they hate water and lick themselves to keep clean anyway.
because a hamster's skin is pink
There is no such thing as a teddy bear hamster. They are called syrians. There are short-haired and long-haired syrians. There is no significant difference, the same way there is no significant difference between brunettes and red-heads.
hamster hair!