This will occur in wet conditions and is common in heifers at calving.

Often the cow is lame on more than one foot and they walk very tenderly on laneways.

Soles often can be pushed in by your fingers and reddish / brown patches are prominent.

If only one claw use a hoofslip. BUT often it is multiple claws/ feet. Treat with non steroidal pain relief and milk once a day close to the shed.