Hello,

My recently adopted 11-month old pit mix does the exact same thing described here while on leash, usually after 15 minutes of jogging.  She spontaneously becomes possessed, grabs the leash, trashes it, and jumps and bites.  This doesn’t happen often – certainly not every time I take her for a walk or a jog – but when it does, it’s incredibly upsetting.  I was wondering if your dog ever grew out of this behavior or if you eventually discovered the cause of it.

Thanks,

Leah