My dog has very good feet Millet but i wouldnt run him on bone hard ground,he is nearly 10 years old and is 84lb in weight honestly he has never ever been laid up with injury to his feet,infact everyone who sees him in the flesh always comment on the size and conformation of his feet,imo the main reason he hasnt had trouble with his feet is because i have had a little patience and waited for a little give underfoot,at the end of the day you may aswell run them on hard frost if your prepared to run them on hard, dry or bone dry plough ground,obviously there will be some who do it but im sure th