Horses done on Sun. On Monday one horse is sore. I'd let his hooves go about 3 mos as they were somewhat self trimming in coarse sand and he was fine. He was sore after the previous trim. His tendons are sensitive to change. If only the good farrier hadn't moved 900 mi away
1. Try to leave the feet slightly longer and not get them too short (something I am guilty of myself....I go for "perfect" first try and then they end up shorter as I correct for trimming imperfections).
2. Measure the current angles before you trim......and try to get your trim to match those angles. Then he won't have a big change in angles.
If he is sound when the feet are long, and you are careful not to get them too short and keep the angles as close the the same as possible, in theory he should stay sound after the trim.
Loosie, when I bo't this fellow, he'd been done by a good farrier. His angles were about 51* in front. He went thro a terrible time with various trimmers with little qualification and he would up with an angle of 45* because of the idea that that was the perfect angle for all horses. At one point the horse was so sore he was lying down 4 or 5 times a day. I nearly put him down. Then a qualified farrier entered the pic and horse did much better after first trim and was fine after the second. Unfortunately the guy move too far away. Loosie, this horse has good conformation. I'm at the point now to just work the horse in the sand round pen and let him self trim again.
Stop measuring angles. There is NO one correct angle that is the same for every horse!!
The SOLE determines the height of the heels and the angle for an individual horse . The sole shape, bars and and the frog determine where the coffin bone is inside and where bevel in the toe should be for breakover.
When a hoof has a chance to wear down to its optimal angle and form it will wear naturally equally around the SOLE.
So we should trim to the sole, equally all round the foot. Some hooves will naturally have taller heels and a taller angle, some lower . But it will be the right angle for that individual horse
And many trimmers remove WAY TOO MUCH hoof wall. So for beginners, leave a little wall (1/4" ) beyond the sole for safety sake, nipping or rasping it to equal height all around the cleaned SOLE. Then when you remove flares and round off the edges a LITTLE it will not all be gone. Horses should not walk JUST on their soles.
Then , to reduce leverage at the toe and prevent strain in the tendons, bevel the toe a LITTLE BIT STRAIGHT ACROSS, from the sole side, at 1" inch in front of the end of the frog on a normal size saddle horse foot.
Loosie I am very careful about how my questions are worded. One fellow who had to retire because of a shoulder injury was very good about answering questions. He was smart enough to know that keeping owners informed was a good way to gain clients.