Birds? Snails? Caterpillars?

If you post an image, that may help us be more specific.

Jean, can't post a pic since I broke my phone yesterday.. But imagine broccoli start...usually has a few leaves. all of them have just their spines left. I was thinking maybe birds, but why wouldn't they have not touched 4 that I've had in containers for 4 days(the ones munched were in a raised bed).

Caterpillars. I've had looper damage in the past and have pretty much been able to eliminate damage from them with regular treatments of bt in my regimen. Plus, there weren't any on the plants when i pulled them from their cells. And there's no way loopers would be able to devour 5 whole plants in a few hours.

Snails. In the day??

I'm thinking rodent, but the only ones that have access are rats, mice, or maybe a possum(highly doubtful). Gophers too, but I haven't had trouble with them at all this year and never in this raised bed

I'm thinking of going and getting another pony pack and setting it down in front of each cat and dog and seeing if they start nibbling.

Kevin