Do not worry, you are not a bad mommy for not having pictures of Dirtnap. R.I.P. Dirtnap, I'm sure my little Jewel can show you around and be your buddy!
I'm am so sorry for your losses, just remember, atleast he was more comfortable at the end of his life and it would have been unfair to keep him much longer. You did a graceful thing for him, you gave him eternal life.