My daughter's horse dishes very badly, but has never had a problem in 8 years .She's a really good allrounder, and doesn't get penalised in affiliated dressage for it.She's won a showing class at a county level show too.
for me it would depend of couple of things, how old, whats shoeing like, does horse have any lumps or bumps it shouldn't??
for me i would want a horse to move a straight as possible and for want you want horse to do i would think you need, the straight in the horse as much as possible - so if me i wouldn't
Would bother me if I wanted to show. I don't think it would be an issue for jumping/eventing/dressage at a reasonable level/intensity. Personally it would not worry me but you would want a vet's opinion if you are planning lots of long endurance rides at a demanding level.
You don't say how old the horse is? If it is young, you may find as it develops more muscle and matures it will fade away anyway.
I wouldn't worry as long as it is not so extreme that its leg is flapping in the wind he he !!
for those distances..no I wouldn't, although I have no problems generally with horses that dish, I own one and she hacks, hunts and jumps with no problem at all, and her dishing is more noticeable when she is unfit or very wound up.
..you choice also looks potentially a little heavy for endurance type work...
Well its definately not a problem in dressage, Archie dishes and ive been told by my trainer that he will still go to GP level and be successful. And ive never had a single comment on it on my test sheets yet. It is however getting better with fitness (i find he dishes more when hes tired) and with good shoeing aswell.
as long as the foot falls were straight a slight dish can be helpful in dressage for the lateral movements!!!
for endurance-provided it wasnt a very marked dish and you didnt want to do thetop level stuff it wouldnt matter(providing its conformation etc was good)