Yes you can
Yes, you can.
All Dwarf hamster are short-haired. The Russian Dwarf, Winter White, Chinese Dwarf, Roborovski's dwarf, etc. The long-haired hamsters are Syrians.
A long haired hamster, also known as a syrian hamster, can grow up to 5-6 inches. Even though they have longer and messier coats types than a short haired hamster, a long haired hamster does not grow bigger in size than a short haired. Long haired hamsters reach their full size a within a year after birth.
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.
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.
By 'Teddy bear' do you mean Long-haired Syrian? And by 'black bear' do you mean black Short-Haired Syrian? Then yes. They are both Syrian.
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.
Yes, you can get long haired and short haired guinea pigs which will grow up to 10-14 inches long while hamsters will grow up to 14 centimetres long.
Pugs are short haired dogs but they do moult a lot :)
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Hamsters teeth can grow to 1 to 2 inches long. That's why they sometimes gnaw on the bars of cages. If your hamster doesnt have bars on its cage, give it some wooden blocks to make it's teeth shorter.
There are both long-haired and short-haired chihuahuas, so both.