my jack rusell has developed a taste for slugs and snails he is 10 and this is the first year he has eaten them. is it a diet problem or what??? he doesn't seem to suffer any detrimental symptoms just the slime all around his mouth which he duly wipes on the carpet!!!
I am pretty sure this is quite dangerous as it can give your dog lungworm. Have you wormed your dog recently, if not I would do it asap - have a word with your vet - but you need a good wormer, not one of the ones from the pet shop - something like panacur which you can buy online quite cheaply.