Crooked toes can also be due to injury.
Injury will cause the hoof to grow faster, and so quickly go out of shape with other toes. Once out of shape that claw just gets worse as the wear is all wrong. Once the wear and shape of the hoof is wrong for long enough it can cause arthritis and problems with the joints, particularly when the animal is fat and pregnant.
More problems then can arise from all the above.
Some of the things I have seen cause toes to grow wonky through no fault of the animal itself.
*Burnt feet from bushfire.
*Starvation - particularly mis-mothering as a tiny baby, leads to problems with early hoof growth the effects of which dont show much until the animal gets to two or three, but can show up later.
*Wire injury to hoof wall (more common in horses as they are more silly about getting caught in wire).
*Foot abscess (but that is sort of the fault of the animal)
*Slipping and injuring the hip, cow is lame, that changes the gait, then the foot grows wrong (should cull cow while it still has weight, unless it gets over the lameness).
*Any other thing you can and cant think of.
I would not go too hard on the heifer unless she starts showing the same problem with no cause. The cow might have had some sort of mishap that you don't know about. If she needs trimming regularly, like twice a year, I would truck her out of my herd because I don't want the trouble, but if it is fixed after a once off trim then it probably was not a genetic problem anyway. If it was a stud bull to cover many cows I would be tougher on it but a nice commercial cow? It does not really matter.