Re: Is it too late in the season for TRH-response test?
Eleanor Kellon, VMD
We have this detailed study as a guide to seasonal changes in that test https://onlinelibrary.wiley.com/doi/10.1111/j.1939-1676.2011.0712.x . Unfortunately they only used nine horses but it's a start. I would do it ASAP. It would be a really good idea to do a Lyme Multiplex too. That tends to flare during the seasonal rise.
Eleanor in PA