These are not him in 1850.
1850 Caldwell County, Kentucky
not him. mother born in Caldwell County
Francis M Davis, 16, born in Kentucky
https://www.familysearch.org/ark:/61903/1:1:M65B-74K?lang=en1850 District 1, Bourbon County, Kentucky not him.
is this him? no. in 1860 he is still with Catherine Canady. And in 1870 he is still in Bourbon County, as a farm laborer.
family 424
William Canady, 63, farmer, real estate: $12,000, born in Kentucky
Catherine Canady, 60, born in Maryland
Francis M Davis, 16, born in Kentucky
Levi, 23, black, laborer, born in Kentucky
https://www.familysearch.org/ark:/61903/1:1:M65T-5M5?lang=en