If it were me, based on what you are saying, I wouldn't think the s. boulardii is making it worse. Less frequency and a little less in amount seems to be headed in the right direction - even if it is slower progressing than you would like. I hope the wound care that you got can help some with the 'ouchies'. Can you use that on both areas, or just the wound itself?
You could try the slippery elm mentioned above as a 'dressing' instead of the Vaseline, but I think it too can act as a 'lubricant'. Honestly, I cannot imagine you putting enough of either on him that if he licked it he would get diarrhea from it. But maybe I am wrong. Maybe catsknowme can say whether or not they have seen that happen when used topically?
I don't know about giving him both probiotics. You can check to see what each contains in terms of bacterial strains. If they don't overlap, maybe it wouldn't hurt.
You could try the slippery elm mentioned above as a 'dressing' instead of the Vaseline, but I think it too can act as a 'lubricant'. Honestly, I cannot imagine you putting enough of either on him that if he licked it he would get diarrhea from it. But maybe I am wrong. Maybe catsknowme can say whether or not they have seen that happen when used topically?
I don't know about giving him both probiotics. You can check to see what each contains in terms of bacterial strains. If they don't overlap, maybe it wouldn't hurt.