I think we all dwell on what we have done with our lives when we realise it could all be half over. I'm well past that point, but fairly happy for now. I went through a bit of a slump in my 40s, but things like running and music are keeping me motivated. It helps that we are financially secure, but I realise that is not the case for everyone and times are hard.
Sorry to hear about your friend. Cancer is cruel and can hit anyone, even if they have lived a healthy life. I think treatments have improved though.
You are doing good work with your dogs. I do think they ought to be more regulated. It could help if people needed a licence to have one as owners have responsibilities. Could apply to cats too as we have been fostering so many.
Stay well.
!BEER
RE: Life after kids - midlife crisis?!!