Anyway, I was given a 2 almost 3 y/o pony mare we have no clue what breed, we were told she had Haflinger in her. I have no clue how to measure her for a harness, she is 12.2hands measured with a tape and slightly off so it could be an inch in ether direction. I plan on buying a lightly used(but in good shape) cart and harness as they are usually cheaper then the same one brand new. Like how would I measure bridle, breeching, back saddle, breastplate, cart shafts, etc?
Also at what age should I be able to start training her for driving? Like can I start as soon as I get the harness? Or should I wait until she is 3 or 4?
Also here are a 2 pictures of her: