Who's been eating my broccoli?

As a woman, I am adept at multi-tasking. What I mean to say is that I can juggle but often I drop the ball, if you get my drift. Today, for example, I had the onerous task of dealing with a hairy carpet (am I the only person who moults like a dog?), rescuing my plants from obese snails, and repotting my prize agave plant – all at the same time. As usual, I was in a hurry so didn’t satisfactorily complete any of these tasks. I gave up with the hairs. Rather like the Forth Bridge, as soon as I’ve picked up one load, my head sheds another. You could stuff mattresses with my hair. I threw a few snails over the wall – oh what joy – but got bored – and tramped one’s intestines all over the hairy carpet, to boot! As for the agave, it’s in its new home but my arms have paid the price. I look like a mature self-harmer. Yes, I shouldn’t have done the job in a boob tube – but it was warm! Anyway, I digress. I wanted to talk about my broccoli. Having carefully nurtured it from seed on my window sill, the 6″ high plants are now in the ground, on the allotment. Already two of the poor blighters have been eaten. By what? Rabbits, birds, snails or mice? Can anyone tell me? I am at a loss. Thank you.