Complex sentence: Super Impose appeared small later in life, due to a sway back, common in old horses, but enjoyed running in the paddocks of Glenlogan Park Stud in Queensland as a "nanny" to some of the farm's young horses.
Split into simpler sentences: Super Impose appeared small later in life, due to a sway back, common in old horses. In retirement, he enjoyed running in the paddocks of Glenlogan Park in Queensland as a "nanny" to some of the stud farm's young horses.