Wow that really stinks! And if those are the disease fact I don't see how a lot of us don't have it too. Preventing it seems hopeless! My flock must be majorly high risk...east coast, free range, wild birds eat out of my chicken feeders. But I like keeping them this way.But I just got off the phone with the guy...Straining to understand him.
But the salient points are:
- Most (75%-90%) backyard flocks have MG(???!!!???!!!!) but because there are many strains, and many are not serious, most people don’t know they have it.
- Evidently MG is a pandemic on the east coast in house finches and many on the east coast are carriers. (Also American goldfinches, purple finches, evening grosbeaks and pine grosbeaks.) My Quarantine pen is right under the birdfeeder on our deck where we feed all of these birds BOSS. Some of it falls through and the birds go in to get it.
- Even if I destroy these birds, my flock is at risk forever because it is in the local wild bird population and unless I stop free ranging and put them in a building where they can have no access to wild birds, they can pick it up. This would mean hardware cloth small enough that a finch can’t get through and roof so that a wild bird can’t poop into the run. (2 years ago before I even had chickens I rescued a blind house finch from my garden and nursed it back to health…I just didn’t know that THAT was MG)
- MG can get passed through to the egg in a bird that is actively shedding. The PCR test indicated that the birds were not shedding much (if at all.) I have no idea if my Barnevelders have been exposed but it takes two weeks to become infected. These guys only started coughing last week. And I have had them in Quarantine…but one of the scenarios is that they got it from the wild birds here.
- Most hatcheries don’t test for MG. NPIP makes you test for Pullorium and sometimes AI but they don’t care about MG because it can’t be transmitted to humans. So you can even get it from NPIP certified breeders.
I have seen no symptoms at all in my real flock. But that doesn’t mean that they don’t have it or are not carriers. 2-5% of birds who get over the disease become carriers and this is such a mild strain that it is hard to say. Just sniffles, no morbidity. And the fact that I take really good care of my birds and they are not at all stressed EVER would allow this to hide more easily.