As has been noted, it does stick closely to the short story (which, as much a fan as I am, is unusual for them), but it is a great short on its own terms.
True, the animation is more limited than previous Disney shorts but, while noticeably simpler- especially in some of the character designs- and not as visually inventive as Disney shorts before, it is hardly unattractive. It is still vibrant and has a charming look to it, with some nicely designed backgrounds and smooth enough movement. The music score is as sumptuously orchestrated, energetic and characterful as ever, not just fitting like a glove but also adding to what's going on.
'Pigs is Pigs' is among Disney's funniest in my opinion, certainly one of the most consistently funny of the 50s decade. The jokes revolving around the reproducing, the handling of the corporations and the executives are incredibly clever and beautifully timed, all of them incredibly funny. But the highlight is the ending, which is a riot.
Flannery is such great fun as a main character and has a very colourful personality, while the voice work is reliably strong.
Overall, excellent short. Despite the animation being in comparison more limited than was seen previously, 'Pigs is Pigs' is among the funniest cartoons Disney made. 9/10 Bethany Cox