She needs to see a vet immediately.
My Dog Won't Move And She Acts Like Her Butt Hurts And She Hasn't Gone To The Bathroom For A While What's Wrong?
Bring it to the doctor and show the vet its privets.
It is simply vet visit time, if you really care and the best to you......
There may be many reasons but you do need to get to a vet as soon as possible. If there is a blockage you need to act quickly. Don't waste time or you could lose your beloved pet!