HD is a condition where the hip joints are not formed properly. Things like poor diet, being overweight, and continual undue stress on the hips may exacerbate the problem. Slamming into a table having a romp will not cause HD.
If she is showing no symptoms, I wouldn't worry about it. JMHO
When a dog saves the life of a man, it becomes clear that partnership knows no bounds.
Fama - T.E.D.D. OEF XI-XII (GSD)(RET... )
Marshall - T.E.D.D. OEF XII-XIII (Lab)(SF EDD)
Lucian - Med Alert (Cane Corso)
Pud - the old man (Pit x Lab)