There is a HICKS family in the 1870 census of Kentucky District No. 6 that includes a David, age 24. The household includes John & Elizabeth, probable parents, ages 58 & 43, respectively. Also listed, probably siblings of David: Susan F, age 22; Abraham, 20; Sarah A., 11; Mollie, 9; John, 8; Carrie, 6; Udora, 4; Harvy, 2; Broron, 9/12. Also listed - Martha age 83 who could be a grandmother.
If any of these people show up with your David in Kansas it would strengthen the potential link.
Hope this helps!