My parents provided more support to my younger sib than me for the simple reason that younger sib often needed more support.

I'm now at the point of trying to encourage my parents to let me offer them some support because it would be nice if my mother (in her seventies) was able to retire soon. The biggest outsized "still working" expense seems to be taking care of the dogs and my father and I have had some discussions on how I could take over at least the biggest of the dog expenses for the current crop of dogs.