There was never any guarantee they would stay put but the version used, the ones with the fabric cuff, were supposed to be the best version out there...there is no blue on the actual shoe..only in the cuff which attaches to the hoof..it keeps it more solid.
Let me address a few other concerns..:). As a reminder the glue ons were first; the horse went about 6 and a half weeks and THEN regular shoes were put on..hence the nail holes..the glue ons were not nailed.
AS for the soreness issue, there was a concern due to the fact that even with nearly 7 weeks growth, the hoof wa still a little short. When the farrier trimmed after taking off the glue ons he took very very little off...it was more like a nail filing than a trim. Prior to the glue ons the horse was very tenderfooted..we didn't know if changing out what I referred to as the "Dr Scholls" version of shoes (the glue ons had a gel pad in between the shoe and the bottom of the hoof) would allow him to be tenderfooted again as the height between the ground and the sole was lessened..if that makes sense.
In this case everything worked out and while there was a definitive difference in the feel going from the gel padded glue ons to regular steel, he is feeling back to what he was with the glue ons and is solidly sound.