I have not used Hyericum Perforatum for years., because we've had very little problems with neuro symptoms in our flock, and In the past we've had mixed results, one hen that I remember did recover...or seemed to..but then died from something undetermined a couple of months later. The second did not improve. It's a lot of work for a chance at good results, plus, even if the bird seems to recover, it does not mean that they are not still a carrier and therefore would be adding to the potential for others to contract it. In the case of this pullet, I'm considering trying it again. I'm very worried it might be heavy metal poisoning, but of course, who knows, it could be lots of things. Even if you can't see it, the ground is probably tainted with metal; there's lots of it out there. There is testing for heavy metal poisoning but it is not cheap. We've had some sudden severe weather over the past couple of weeks, followed by mild weather, followed by more severe weather. So I'm sure this is difficult for the young ones to deal with, and their immune systems suffer because of conditions like that.
Just rambling to point out some of my own observations as I try to decide what to do with this pullet. There are so many causes of neuro or lameness issues in chickens including Marek's, Lymphoid Leukosis, vitamin deficiencies, metal poisoning, Mycoplasma Synoviae, Avian TB, injury, etc. and most of them you're left mystified because the symptoms are so similar and there's just nothing to differentiate. It's true that vets tend to use "Marek's" as a sort of catchall term. Based on my personal experiences and observations over the past couple of decades, I would just caution that you should not expect long term miraculous results from Hypericum P, although of course there are exceptions to every rule. I've been trying for years to coach myself not to become too attached to these birds...especially some of them. I never seem to learn though.
