Slugs, mice or rats

We made a mistake in planting  4 courgette plants.
Courgettes hide amongst the foliage and turn into marrows.
large marrows.
The biggest we have  grew was 2.4 Kg.
So friends, neighbours and work colleagues have benefited

And marrows arew actually apretty uninspring vegetable, but there is marrow gratin  and marrow and carrot soup. The latter is actually  quite good.

But something has been getting at the escaped courgettes

Probably not rats- its diffuclt tos ee hoe they could get in but a  rat box will hopefully dissuade them form coming back .