Delphiniums V Pesky Slugs

I grew delphiums from seed last year for the first time - very pleased with them . This year I noticed that some are showing- I put the slug pellets down . On examination yesterday the slugs had got two of them ! I cut them off neatly with my snips , now will these regrow now

TIA

PS : They are now surrounded by pellets and beer traps !

 

could it have been caterpillars do you think? i've no experience of delphiniums but the other day i noticed "something" has been eating all the growing tips on my lovely little Red Robin bush, i assumed it was slugs but after creeping out after dark with torch in hand i was surprised to find a couple of large green caterpillars munching away happily, they must be kipping in among the primroses which are directly below the Red Robin & only venturing out once dark when they're safe from birds. hope my poor Red Robin recovers

ps i didn't harm the caterpillars...i just moved them on to pastures new