OOoooo - When Babe (The first movie) is trying to get help from the new sheep, you'll notice a rain of...Well...Poop from the hind ends of a couple of the sheep. Not only do they play this scene once...But, TWICE!
I really don't think this is a slip-up. First of all..they show the exact same scene 2-3 times..(I tend to lean toward 3). The main reason I think it is meant to be there..is that if you listen closely you can hear studio added sound effects for the feces hitting the ground. I think this was meant to show the sheep's distain for Babe.
Having personal experience in the filming industry I believe there must be a logical reason for them to use that specific scene more than once. perhaps they could only use the animals for only so long, or maybe they needed to continue with the film itself, rather than waste time on a certain part over and over.