I had sewed and just thinned out a few lines of carrot seedlings in my veg patch (have grown them the last 2 years with no issues) and overnight they have just vanished along with half of my parsnip seedlings! There's no disturbance to the soil, can't see any slug or small trails and there's not a sign of any remains, it's like they were never there to begin with. Even dug into the soil and there's just nothing... no leftover roots etc?! Any idea of what did this and how I can protect against it in future? I've got copper tape around the veg planters (was wary of using slug pellets as my toddler likes to help me with the gardening) but I'm aware bigger slugs don't seem to mind it the way smaller ones do. Everything else is growing nicely and apart from the odd hole in my radish leaves everything is pretty much intact. Very much learning as I go so any advice is welcome!