planete
Well-Known Member
I hesitate to write this because it is going to sound far-fetched but I have heard of stress triggering a latent muscle myopathy. A PSSM2 horse can be asymptomatic until such an event sometimes. Explosive behaviour and bunny hopping made me think of this as a possibility. It might be worth putting her on some PSSM2 appropriate supplements and see if it makes a difference.