What would take a munch like this out of a squash?

[FromYorkshiretoBucks]

I’ve just found one of my 2 baby boo squashes with a bite out of it? Any ideas? Also if I cut off a significant section is it cookable?

[Plot70]

Slugs do that kind of damage.
They start when the fruit is young and the skin is still soft.

[Jungle Jane]

Could be mouse or rat,cutting the bit off & washing will be fine to cook.

[Jungle Jane]

I would put something round the other one to stop it being got at,happened to about five of mine,the only good one survived coz it was climbing the beans.

[ameno]

I see a significant amount of slime in the picture, so I'd be inclined to say slugs or snails.
I doubt it's rodents, as rodent tooth marks would be a lot more apparent.

[Plot70]

I have a winter squash that survived with a scar on it after a slug attack a couple of months ago. A few slug pellets revealed a dead slug that would have been six inches long at full pelt.

[FromYorkshiretoBucks]

Thanks all, it was washed and the eaten bit cut off and we had it in a butternut squash and pesto butter bean and kale salad today for lunch!