Hi....this is Roy. LOL
Hi have to agree with everyone else here, your snakes have tape worms. As far as where they came from.....there are LOTS of different tape worms and actually they can come from other prey species, like fish and amphibians....they're not only found in warm blooded prey. As far as the treatment, I'd probably be working with a vet if you're not real comfortable dosing the animals or getting the meds. Looking through "
Understanding Reptile Parasites : A Basic Manual for Herpetoculturists & Veternarians", they also recomend using Droncit (just a commercial name for praziquantel) at a dosage of 5mg/Kg orally or injected. They also recomend to treat the animals again after two weeks, to make sure you get them all. Don't be surprised if after you treat them that you see lots of worms coming out......that'll happen as they're being killed. I would definitely treat all the "Pugets" that you have....more than likely, if one has it the others may as well. As far as the gaping and mouth wiping....this sounds a lot like what two of mine did. I wasn't able to totally diagnose what was causing it, but they eventually died from some unknown ailment. I almost wonder if it's not some other bacterial infection of some type or another. I would also seperate them all if you can. It'd be best for telling how they are doing and to keep the ones that are doing well, from picking up anything from the possibly sick ones. Well I wish you the best with your snakes and as Rick (aka: Cazador) had said, I'd definitely contact "Bob". I don't know if it'll really help.....I've heard nothing since contacting him about loosing my three snakes.
Good luck.......Roy