hi there,
this may help, it was what i did with my litter when i was struck with puppy fading syndrome, when vets have done post mortoms on puppies with fps it is found that no bacteria is found in the gut at all, not good or bad, when i starting losing my puppies i researched alot. with this i started to feed the remaining puppies with actimol, putting the good bacteria back, i also feed mum this, the remaining puppies went from strength to strength and all grew up very healthy and fit.
now i give my dogs 1 actimol aday and they love it.
hope this helps anyone suffering with fps