BTW, anyone involved in formal S&R for a person is covered by NH workmens compensation if they are injured on the rescue. That is not extended to pet rescues. A high profile member of S&R in the region (as well as a major animal lover) reportedly got a serious back injury years ago putting her out of work for some period of time helping to rescue a Newf out of the Great Gulf by irresponsible owners. It doesn't just happen to out of shape pets, thru hikers with dogs have had the same problem in the Northern Presi's and the Mahoosuc's with torn pads despite the dog walking all the way from Georgia. There is no full time vet in Gorham, the closest is North Conway, I have heard of at least two thru hiker incidents over the years where the hiker had to get off the trail for several days and eventually left it as they spent the money they needed to finish the trail on vet bills (at least that was their claim as Gorham tends to be big hurdle for some).
My friends long time hiking companion Golden Retriever wore off his pads part way on a ridge traverse (Jefferson, Adams Madison) one day despite hiking all summer. Not all dogs seem to have the issue and some folks like Unadogger carried booties for their dogs for those occasions.