The dog who runs after the convicts is not the dog who returns from running after the convicts.
In the beginning when the convicts make their way into the village of Lake Monte Diablo, Granny grabs a 45/70 single shot rifle from the wall and hands it to Marcia to cover the men.
When the women go outside to meet the men, Marcia points the rifle at the men & warns them.
As she raises the rifle, Marcia is now holding a Henry lever action repeating rifle.
When the women go outside to meet the men, Marcia points the rifle at the men & warns them.
As she raises the rifle, Marcia is now holding a Henry lever action repeating rifle.
After Barbara and Clyde finish talking, Barbara leaves and as Clyde looks into the distance you can see tire tracks on the ground.
The villains are told that the "guns are under granny's bed".
They look and find them under her mattress.
Granny is bedridden and in that bed most of the time ... on a pile of rifles and six-guns in holsters.