No, a hard stomach is not a sign of pregnancy in rabbits, but it probably is a sign of illness (maybe gas, bloat, or GI Stasis -- all very serious conditions!). See the vet right away! See the related questions below for more detail.
No, you can't use hamster bedding in a rabbit's nest. Bedding should be clean straw or grass hay.
The mother rabbit should have a nest box that you can remove from the cage while you clean it.
the hamsters stomach will get really hard, it will start to grow, and will try to find extra bedding for its new babies
Those may be her breasts. She is probably getting ready to have hamster pups, but not that soon. It takes longer for hamsters to have babies.
She ate herself
They'll grow around the middle. Not like a human pregnancy with a bump in the stomach (although the pregnancy will show here at first) but all around; their hips and stomach both will look very bloated and if you touch it GENTLY will feel somewhat firm and bumpy.
your rabbit is either pregnant or faking a pregnancy, usually called a "fake pregnancy" When rabbits prepare for a pregnancy they usually make a nest and to pretend that they are they express the size of their stomach. If your rabbit begins to pee blood it may be pregnant and if it dosen't it is a false pregnancy. To explain the growing of your rabbits nipples is because of the exaguration of her stomach. If you have any more questions please e mail me on wertinslipper@live.co.uk Hope I explained it ok.
It could mean they have an abdominal obstruction, or some other metabolic problem. You should consult a veterinarian and provide all the available symptoms. It is assumed that a hamster pregnancy would be easy to discern, but not always.
it normal to have a cold stomach during pregnancy
No. The citric acid in the juice can cause stomach problems for your hamster.
No, a dog's stomach does not get smaller after a false pregnancy. It remains the same.
Anxiety, gas, pregnancy... if you have questions, ask your doctor.
no, you cant sleep with a stomach during pregnancy
Nothing is made in a mothers stomach. Do you mean womb? A baby hamster is made in the mother hamsters womb, and then born. This proccess is the same with all mammals (apart from duckbilled platypus) including humans.