Mine are only pups at the moment, but I was really hoping that they'd stay under 13.5ins at the shoulder so they could compete in the 'Small' category for agility, but Roxy is nearly 13.5ins already!! She's a 4.5month old Working type cocker,her parents were 12ins (Mum) and 14ins (Dad) at the shoulder. Rio's parents are (I think) nearly 14ins (Mum) and around 16ins (Dad), so she'll probably end up being a 'Medium' agility dog.