When the raccoon is first playing with the tin can on the workbench, it is obviously a smaller can, and it's already on its side and clearly empty; there could be no metal nails inside because it wouldn't roll around so easily or not be spilling them out onto the bench beside it. Then after the can falls, it is obviously a much larger can and there are far too many nails scattered on the floor to have come from the tiny can that had been shown on the workbench.
When the wooden churn breaks open, there is clearly no dog visible in amongst the churn's wreckage.
When the coon is playing with the bells, we hear them tinkling noisily, yet the coon isn't really swinging them all that much, and the bells' clappers are hardly moving at all, but are mostly just resting against the sides of the bells.