Our Shih-poo is 5 months old and we have been worming him regularly. Today we caught him in the garden and he had possibly eaten a snail. Should we be concerned about this for lungworm or are we being overly cautious? He’s currently wormed with Drontal oral suspension. I’ve been researching tonight and it would seem there are not many medications that mention lungworm. I was looking at Panacur but another forum suggests this is only used to treat LW and not actually prevent it. Any suggestions? Is there a routine preventative treatment for lungworm?