Every orca pod that has "adopted" Stumpy has done what they have had to do to ensure his survival. As human parents, my husband and I do the same. We monitor, we keep the extra eye out to ensure the kids' safety and make sure their basic needs are met because at this point, they are unable to do so on their own. We are working towards that, but not at the finish line. Every orca that swims alongside Stumpy and "takes a shift" as my husband and I sometimes refer to it, probably seeks ways to push Stumpy along too.
Of course, my kids are mine and have stayed in our "pod" while Stumpy has associated with several. That makes me even more in awe of orca as a species and proves how deep a sense of family truly is for them.
People tell my husband and I sometimes that they admire us; what we have to face and overcome parenting special needs kids. Well, the orca that parent Stumpy have us beat as far as I am concerned. They aren't obligated by way of true lineage. Stumpy isn't even "theirs". Our family takes care of our kids because they are ours. Of course, we love them and cherish them for the amazing people that they are, but the bottom line is they belong to us and we have a direct responsibility for their care. The orca that share the waters with Stumpy are keenly aware that he needs their assistance despite him not being born into that immediate family. They know he's not theirs. But they do it anyway. They have assumed that responsibility by choice. It might be natural instinct. It could be a sense of "doing right." Whatever it is, it is truly remarkable.