we watched an episode of "Dogs Behaving Very Badly" last night..

One case study concerned a couple having problems with their 4 dogs..
From edit to edit within scenes, one of the dogs kept changing
from a small black terrier to a much bigger brown beagle like pooch..
Without any mention or explanation...???

Something [terrible...???] must have occurred during filming
that the producers had no hope of fixing in the edit,
but just had to rush on with the show
hoping most of the Channel 5 audience would be too thick
to notice the perplexing mysterious shape shifting dog...