twelve year old lab whose back end has been declining since fall and we are in what looks like an eighteen month mobility window before end of life, the published advice is aimed at the final weeks and is not helping us think about the runway, looking for input from families who lived through the slow decline phase and figured out how to extend functional mobility without losing the dog in the process

Otis is a 12 year old lab mix (lab and something hound, about 70 pounds when he was fit, currently 76 and we are working on getting that down) who has been a functional active dog his entire life. We hiked with him weekly until he was 10, he kept up with the kids in the back yard until about 11, and the first signs of decline came last August when he started slowing on the back half of our morning walks. By October he was visibly stiff getting up from a nap, by December he stopped going up the stairs to our bedroom on his own and we started carrying him at bedtime, by February he was struggling on hardwood floors and we put down runners through the hallway and living room. He is now at the point where a 20 minute slow walk on flat ground is his ceiling, he gets up from naps with effort and sometimes needs a hand under his hips, he has started knuckling on his back left foot occasionally on longer outings, and he goes outside to potty in the back yard but no longer makes it to the back fence and back on his own. He is on carprofen daily, gabapentin at night, an Adequan series we did in March, and we are scheduled for a rehab consult next week with the local sports medicine vet.

The thing i am trying to figure out and that the published advice is not helping with. Every senior dog resource i find online is either about the final weeks of life (when to know, how to know, the conversation about euthanasia) or about general senior wellness for healthy older dogs (joint supplements, low impact exercise, comfort beds). The window we are in is structurally different from both of those, we are at the start of what our regular vet estimates is twelve to eighteen months of progressive mobility decline before end of life decisions become relevant, and the question i need answered is not when to euthanize and not how to keep a healthy senior healthy, it is how to manage the slow decline window so that Otis remains the dog we know for as long as possible and so that we do not exhaust ourselves before he is ready to go. My partner and i are both working full time and have two kids in middle school, we love this dog and we are committed to whatever he needs, and i need a framework for thinking about the next year that the published advice does not seem to offer.

Specific questions i am bringing here because i do not know who to ask. one, the timing of mobility aids, when do you introduce a back end harness or a wheeled support cart and how do you decide. Our vet said when he needs it which is true but is not actionable until you have lived this before, and i am trying to understand whether early introduction extends functional mobility or whether dogs who use aids decondition faster than dogs who push through. two, the question of how much exercise is the right amount during the decline, every instinct says shorter walks to save his joints, but i have also read that maintaining muscle mass is the single most protective factor for functional mobility and that under exercising senior dogs accelerates the decline, and i do not know how to balance these. three, the home environment changes that actually matter versus the ones that are theater for the human, we have done the runners on hardwood and the orthopedic bed and the raised feeders, what is the next tier of modification that produces a measurable difference. four, the question of when to bring in outside help for handling, my partner cannot lift him at 76 pounds anymore and the carrying up the stairs is starting to be a workout for me, and i am wondering whether to start using a sling or a harness sooner than i feel we need to so that we can sustain the support for the long run rather than burning out. five, the emotional part nobody writes about, watching the decline is its own work and we are starting to feel the anticipatory grief that does not have a name in the books, and i would value hearing from families who lived through this what they wish they had known about the year before the year before the end. would love input from rehab vets, families with senior labs or hound mixes specifically who have been through this exact phase, anyone who has used mobility aids and can speak to when they introduced them, and anyone who has practical framework for thinking about a long decline that is more useful than the published advice has been for us