If you’re dealing with salmonella, that info on not treating doesn’t sound right at all for hedgies. Yes, I see where on the human CDC site, it says that as a possibility... but these aren't humans. I think it would be best to really go back to basics in terms of quarantining the hedgies from one another (the exception, of course, being the babies needing to be with their mother to nurse).
By quarantining, I mean, get some Sterilite tubs as temporary homes. Clean those out really well. Personally, I’d go with bleach and water. Rinse. Let dry. Rinse again. Let dry. Then put the each hedgie in a separate tub (again, with the exception of babies who need to nurse – keep them together). Then clean the heck out of their regular cages. Clean their laundry. Their toys. Their wheels. Their dishes. Their everything. Get them all back on meds. Yes, acidophilus will help settle their bellies in between their med doses. But not just on its own… not for salmonella.
After their original homes are cleaned, put them back there with their newly cleaned laundry, toys, etc… and clean the heck out of the temporary homes. I’d do something like this:
Day 1: clean temp homes and belongings
Day 2: transition hedgies to temp homes; clean permanent homes
Day 3: keep cleaning
Day 4: transition hedgies to permanent homes; clean temp homes & belongings
Day 5: keep cleaning
Day 6: transition hedgies to temp homes; clean permanent homes
Day 7 through until everyone is better: Keep up the quarantine and meds…
During this, you’ll also need to pay attention to yourself and how things can be transmitted through you: wash your arms & hands and change shirts in between handling each hedgie and their belongings in addition to beforehand and afterwards. Yeah, it’s a pain in the rear, but much better than spreading stuff back and forth all the time. Use hot water in the washer; dry on high heat. You want to kill this bug off. It shouldn’t just hang out in your home or your herd.
Also take a look at where this might have come from originally. I know there’s been a recall of several brands of cat food recently for salmonella contamination. Double-check what you have against the recall lists currently out there (and posted on the boards).