Good sketches can be short or long but, no matter how long they are, they should be trimmed of ALL excess verbiage.
Again, that's not to say that all dialogue should be short. If a character is verbose, his verbiage isn't excessive in the context of the script.
Also, the English language frequently offers many different words that mean essentially the same thing. it's important to use the right word(s) to get the best comedy effect.
For example, not many people would refer to 'over 400 eggs'. They'd be more likely to say 'more than 30 dozen' - and it's funnier to use dozens because people can visualize 30 dozen eggs more easily than they can 400 eggs.
In fact, when you think about it, that many eggs aren't very many in the context of the terrible damage that's been caused. Maybe up the number to 300 dozen?
For similar reasons, we should look at the milk - and for some reason 'six milk urns' isn't nearly as funny as (however many) litres, because litres paint the mental picture of all those cartons being smashed and splashed all over the place.
Drive a motor bike at speed into six milk urns and the milk will run all over the floor. Drive it into a huge stack of milk cartons and the flying milk will hit all the walls and most of the ceiling before running down onto the floor. It's just funnier.
To get the recipe right, you'd need about 200 litres of milk to make 300 dozen scrambled eggs. And I assure you, there are countless comedy-loving cooks and chefs who will adore you for getting that detail right.
And do your policemen need names? It doesn't really matter but 'Senior Cop' and 'Junior Cop' seem better to me.
So, my idea of your tuned-up, pared-down script would look something like this:
We see a burnt out building with a surviving sign identifying it as a 'Farm Shop'. The grass outside the shop is covered in motor bike tracks. Two policemen are discussing the incident.
Junior Cop:
"Someone drove a motorbike right through the shop and smashed 300 dozen eggs and 200 litres of full cream milk before torching the place, Sir. The farmer was in bed, but he heard a motorbike!"
Senior Cop:
"And no ordinary motor bike either. This is the work of a scrambler"
ENDS