u/marmaduke10

I've just been walking with my lurcher (beddlington whippet, 4 years old)

We did 13 miles the first day and 7 the second. She's done long walks previously but this is her longest. She seemed absolutely fine, and will sleep more today, but I know it can be hard to read pain in dogs so I'm wondering how you tell what the limit is? any idea or experience?