Certain types of footing and weather create more self trimming on the hooves. The trim must be changed based on this.
A hoof navigating deep mud will round the outer walls on their own.
The hoof can not have a normal trim or the hoof will end up over trimmed.
will see heel loss.
Learning to scale back trim frequency, to the needs of the hoof, is vital.
Looking ahead in the forecast. If you see several weeks of warm weather and rain this needs to be taken into account.
Just the same if your horse is navigating over frozen ruts.
Most horses will also grow less hoof in the winter. They are standing around more and eating hay instead of pasture. Less hoof mechanism, slower metabolism, and more fiber dense food source, slows the growth. But winter terrain and weather self trim a hoof more than soft lush pasture.
So, always check the weather, note the terrain, adjust trim schedules to the need of the hoof. Or you will end up with very little hoof left ,by spring time.