Age of growth-plate closure - border collie

[Chrisalice]

Does anyone know what the breed average is? Surprisingly hard to find any stats!

I agree it is hard to find scientific evidence on this. I had a 10 month old collie x rayed (for another reason) and his plates were closed but I had another one that grew several inches after the age of 1. So I am no help at all.

Do you want to know re exercise or just general curiosity?

I would hazard a guess at somewhere around 18 months.

Thanks, there are references all over to the difference between breeds and sizes but nothing specific. I've seen a few sources saying their collies were x-rayed for whatever reason and plates were closed averaging around the 11 month mark, some as early as 9.

I was thinking I might start adding 2 minute jogs every 10 mins or so into our softer surface outings - that would just be no more than a trot to the 10 month pup - just for variety as much as anything.

I'd be surprised if it was as late as 18 months - my dog is the size of a small border collie and he'd stopped growing before 10 months

He had X-rays at just over a year and the plates were definitely fused by then