I have never had slugs or snails attack foxgloves and I have plenty of them. (Slugs, snails and foxgloves, that is.)
So, I would think it might be something else, and I'm sure others will know.

I shall have to take a closer look and see what i can find or maybe a pic. thanks Ojibway. ;)

My foxgloves have also been attacked, but only the 1st year growth, not the ones about to flower this year. I too thought it was slugs so I'll be interested to know what other gardeners think.

this grub turns into a dull moth, cant remember which one. they chomp on lots of different plants. up to you if you leave it or get airborne into a neighbouring area.

Thanks seaburngirl your a star. ;))

butterfly and moth eggs are normaly layed bye the parent directly on the plant they are to eat so your caterpiller has to be the culprit especialy as foxglove is so toxic to lots of things including humans .

So the foxglove has met its achilles heel so to speak, i have dug up grubs/caterpillars very much like this in my veg patch actually in the ground(recently) maybe overwintering until the weather warms up like it did about a month ago....maybe thats the case seeing as ive never heard of adult moths hibernating over winter like butterflies or maybe some do, im intrigued to know... thanks Noseypotter.

your more than welcome windy . one mans meat is another mans poison . as it goes if youve herd of poison arrow frogs there not born poisonas but pick up the poison of of there insect pray . also theres a marine nuedebrank excuse my spelling which is basicly a marine slug that eats the portugese man of war a very dangerous jellyfish . this creature also steals the jellyfishes poison and uses it for itself .my mum used to work as a relief warden in an old peoples complex . in a big field next door there was a machine gun post/pill box built for if zee germans had invaded . i went in there one cold winters day and to my amazement sore litteraly hundreds of red admiral butterflies hybernating . i so wish id had a camera . i thaught it was ironic that something so beatiful surviving in what was supposed to be used for killing . a lot of grubs are from beetles to as there the most common insect on the planet bye species that is . most live as pupa under ground as well as crane flies which i surprisingly found out the other day .most things in nature have to have a predetor what ever they are or they would breed and grow uncontrolably like ferral animals do like cane taods,rats,mice,rabbits ow and ofcourse humans .

this definatly looks like a caterpiller as aposed to a beetle grub .