My trainer used to breed to the Trekehner stallion Schonfelder and had a total of 17 Schonfelder horses in her barn. She has one left who is one of the last Schonfelders, sired before he died in 2000. Within the last year he has developed a rather severe case of PSSM/EPSM which does not seem to be improving all that much with the diet. The diet might make his walk sound, but he is still off in the other gaits. Looking back she said that about half of the Schonfelders had similar problems (but less severe). All starting with not being able or having a hard time holding leads behind. She said that all the ones that were good were out of two 'Raise a Native' bred Thoroughbred mares.
Reading up on it, it seems to be genetic and I was just wondering if anyone else has had or heard of a Schonfelder first or even second generation that has these problems?