A suggestion on dog gear...
I have an 11 year old very fit Rez dog rescue. She has climbed about a dozen 14ers over her years and countless other 12'ers, 13'ers, and big days up to 26 miles in the Sierra's. She's fit and tough.
Despite that, a few weekends ago she got too sore and was unable to hike back down Elbert with us. It happens, we made a poor decision and pushed her too hard over the weekend.
My husband and I discussed what to do, whether we keep encouraging her and just go slow, carry her, etc. We then remembered in his pack we had this: https://fidoprotection.com/
Turns out it worked pretty good, we secured our dog in it and were able to carry her down the rest of the way. Our dog weighs about 47lbs so it was a quad burner hiking down, but doable. The sling also is not very comfortable and our shoulders burned up pretty quick. BUT, our dog sure was happy getting a free ride.
This isn't meaning to sound like a promo ad, nor to get additional criticism on our bad decision for which we already have extreme guilt about, but more a warning that an investment in some kind of rescue equipment if your dog is injured is a VERY good idea. We had believed our dog to be able to withstand quite a lot of strenuous days, but at her age we need to be more mindful of her limits. We took a foot/paw soak in the creek at the TH, and then some days lounging in the bed at home, extra table scraps, and she's GTG again.
We have also trained her to drink straight from the hose of our Osprey packs, she just turns around in the trail and looks at us to ask for water. She usually ends up hogging most of it.