She seems like a great mare, love her look by the pictures you've posted. That first picture is too cute.
I'm not a huge fan of futurities either.. I think you've got the right mind set of going ahead with slowly putting her on barrels and if you think she's not ready for it then don't do it..It's not worth it in the long run. If your vet says she's ready for it and she can handle it I don't really see a huge problem with it but she's your horse and it's your decision.
I'd love to see any videos..Even if it's just slow work and ring work..
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