Is there something made to strengthen hooves?

I remember a woman at a Tractor Supply store years ago, she had long, nice fingernails.
I asked about her not breaking the nails, and she said she used some hoof treatment.

I'd like to stop my old toe, and fingernails from splitting seven ways to Sunday.

These premises insured by a Sheltie in Training ,--- and Cooey.o
"May the Good Lord take a likin' to you"