Thanks RC. I definitely would have noticed if one of the hens wasn't pooping. I noticed it that time when Mary's hernia was blocking her gut. So now I'm even more confident they didn't develop sour crop from the kefir they ate last time. Also I don't think the kinds of grasses that block crops grow in this area. There are none in the backyard.
So, what would you recommend regarding duration of kefir for probiotics? Or should I try probiotics in a different form?
The role of probiotics is to replace bacteria killed by the antibiotic and any associated changes in pH.
I am not in all honesty sure whether they work because they have the same bacteria that got killed or they alter the gut pH so that the good ones can recover from the assault of the antibiotic! Either way, there is good evidence that they work.
The reason kefir is viewed as a good probiotic (even though it contains candida) is because it has a way more complex micro-organism mix than any commercially available probiotic. I mean many, many times more different types.
Logically you should start after the end of the antibiotic treatment - or on the last day - because otherwise the antibiotic will kill the bacteria you just supplied them with in the priobiotic. But some advocate starting in parallel because the antibiotics don't kill all the bacteria in the probiotic.
I haven't seen any studies on duration (I haven't looked very hard) but there are studies in people that shows it takes a couple of months to restore gut flora after antibiotics. I don't think you need to take probiotics for all that time - because as I said, I think they work by making the environment better for the normal gut bacteria, not only by replacing them directly.
So, as usual, you are needing to apply some judgement in the face of only partial evidence. Here is what I would personally do in your situation:
- Start probiotics on the last day of antibiotic treatment
- Continue them for about a week maybe 10 days
- I would probably start with a commercially available probiotic supplement and then switch over to kefir (or add in Kefir) about half way along
I can't tell you that is perfect, but I am pretty confident it isn't harmful and has a high chance of helping.