Hank has had 1 or 2, I've never seen him lame from them, just see them growing out. Even if Jess does go lame it's only a day or two before she's back to work as once they've popped it doesn't hurt any more as the pressure is relieved. One that Jess had that made her lame and the vet dug for took forever to heal and even with a drain it tracked up her leg and came out half way between the fetlock and knee, she was off for 4 weeks for that one and even after that she was tender footed around the drain for ages.