What will your hamster behave like if it is expecting pups?
Well to start with, when my female dwarf was expecting and we didn't realize i noticed she was doing things she wouldn't normally do, like get fatter, running around in circles, either she or the male will do this for a few days before birth, hamsters are only pregnant for 18-21 days, if they are in with a male, the female will happily co-exsist and share a nest with the male, if u notice that the male is sleeping away from the female usually in a separate part of the cage, that means she is due to give birth and making the nest ready.
May i also make the point that before the mother gives birth, clean her out and replace the cotton wool bedding with tissue paper, mum will know what to do, she will shred it for bedding because baby hamsters can suffacate in cotton wool or get their limbs caught and bacause they are so delicate the cotton wool will rip them off, also one of my babies had a mouth full of cotton wool and i had to intervene and get the wool out of its mouth, this is never a good idea because mummy hamster is liable to kill the babies if u interfere, espacially if she's a first time mum, she'll be very over-protective.
Hope this helps
If a hamster mom eats some of her pups, don't worry. It's natural. It means she doen't think she can handle all the pups so cuts down the numbers. If you don't give the mom enough to eat and drink, she will kill her pups and save them a long death of dehydration or starvation. Also, if you touch the pups, she might reject them, or eat them to protect them. It sounds wierd, but…
It doesn't take much to stress a hamster out so when a female gives birth her cage should be isolated from other cages (she should be the only adult hamster in her cage too) in a darker and quieter area. She should also be given plenty of food and water, and have a wheel to run on at night. The pups shouldn't be touched by you either.
The mother hamster will kill the babies for their safety. It sounds strange, but if you disturb or touch the pups, the mother will think they are "infected" and will kill and actually eat the disturbed pup. Just make sure you don't touch the pups until they are old enough so the mother won't kill them.