Quarter horses do tend to be the best for barrel racing but Arabians are deferentially not suited for it. You can really use any horse for barrel racing but it is SUPER IMPORTANT that you make sure they have the right body build and athletic abilities to preform the task. Arabians typically don't fit the needs. I am a barrel racer myself so please take this advice.
Yes they are the same breed, but the term 'Irish Pony' can also be applied to any pony from Ireland so it is best to refer to each pony by it's correct breed name.
TB or TBX
The pony's breed does not matter so long as it has the proper training and ability to jump the height and obstacles that it will be asked to jump.
Shetlands are a breed of pony.
A pony. Even if the breed's a horse breed not a pony breed.
you go to pony island then imagine that your breeding a pony
It is a cross breed of pony.
the shetland pony is a breed of pony.. not a "catergory" as such
sheltland pony.
It's the Dales Pony. For more information on this specific breed of pony, see the website of the Dales Pony Society at the Related Link.
A pony is a sub-species of horses. Basically you get ponies when you breed horses rated as ponies.
it would depend on what breed the horse/pony is, for example, a heavy horse breed will in most occasions be heavier than a pony but with a light weight horse breed there will be some pony breeds that are heavier. hope that helped :)