Hi... My small Rottweller can't walk probably, especially after meals totally can't moved, take more rest then walk few steps then take a rest again. Don't know why it is happen?:( :confused:

That is not normal. It is a serious problem, the puppy needs to see a vet. It is a judgment call and I may be wrong, but if you can't find a vet open tomorrow, Monday may be soon enough. If you have a Petco or Petsmart nearby, they may have more friendly hours.