Immediately consult your local vet.
I wouldn't guess what is wrong but it does not sound normal.
Yes
The abdomen (the area from the bottom ribs to the pelvis) is primarily filled with the small and large intestines as well as other organs. The major reason for a lower belly that is "swollen" and "hard" is simply the presence of stool in the intestines. If you haven't had a bowel movement in a while or if you are off from your normal bowel routine, you could be constipated.
Your stomach gets hard around the 5-6month.
A rigid abdomen could be a sign of peritonitis or Wilms tumor.
It could be anything. Take her to the vet to get her x-rayed.
Well yOu cOuld Be Pregnant..!!
pelvic immflamatory disease or pregnant
Try taking a pregnancy test. More then likely It could be that your pregnant.
Yes. When you are pregnant your digestive system slows down so that you have more time to extract all the vitamins from the food you are eating. Therefore constipation is a definite symptom of pregnancy. At the same time, your bowel extends, causing your belly to protrude somewhat, making it seem swollen and hard.
Aneurysm
I would see your GP about this as it could mean you are pregnant but it could mean a number of other things.
If your stomach is hard nine weeks after period you are probably either pregnant or blood is filling up in your stomach