Don't be hard on yourself, this happens.
I had a senior cat who nails I had been clipping for over 14 years, right before he passed I took to the Vet for a wellness check up and they found one of his back paws has a nail growing into the pad. It was a case of me missing his nail during the previous clipping.
It happens, but like you I now make sure I check every paw pad also when I am clipping nails.
__________________ Cheryl,Mom to  SophieKate |