>>>>Is there any way to get a for sure.....Is there any DNA or blood tests that would tell for certain???
Unfortunately, no. DNA records are kept by breed registries to parentage-verify registered horses and to compare known registered horses, etc-- there is not a "what breed of horse is it" database like the CSI-types of databases for DNA we think of in humans.
Your best guesses for what breeds the filly has in her ancestry are going to be based on looking at her color, conformation, type and movement.
Many breeds have the tobiano pinto pattern in their genepool-- for example American Paint Horses, Tennessee Walking Horses, Saddlebreds, Missouri Fox Trotters, and several of the pony breeds as well as some warmblood breeds can come in tobiano. Registered Arabians, Thoroughbreds, Quarter Horses, and Appaloosas are not known to have tobiano genetics in their genepool. When you cross a tobiano with non-tobiano you can get tobiano, so being tobiano does not mean that one parent is from a registered breed-- there could be multiple generations of cross breeding behind your filly just as easliy as the chance of her being from one particular breed or having a registered parent from a particular breed.
I also believe she looks "tovero" and possibly roan or grey as well-- all that means is that besides the tobiano pinto pattern, she could have other white-producing patterns. Toveros do NOT have to have blue eyes-- sometimes they do, but not necessarily all of them do.
Size can vary a bunch, even between horses registered in the same breed, even between relatives. I have a registered Appaloosa mare who is a true 16.2 hands tall and BIG. Her half-sister, also a registered Appaloosa mare, is barely 15 hands tall. Same sire, different dams. I have another registered Appaloosa half sister to ther BIG mare, this time same dam different sires, who is over 15 hands tall as a 2-year old-- she is not going to reach 16.2 like her 1/2 sister, but looks like she is going to be bigger than her 15.2 hand sire. The 2 year old's half brother (same sire, different dams-- not related to the BIG mare at all, LOL) is not yet 14 hands as a yearling and will maybe make 15.1 like his dam, but I doubt he will reach the 15.2 of his sire.....
All of these "six degrees of separation" related Appaloosas are also different colors-- one a solid palomino with socks and a big blaze, one a red dun with a spotted blanket and socks, another palomino with a blanket with no spots, no socks, another solid chestnut with a blaze and rear anklets....
Does your filly "just" walk, trot, and canter, or does she do any other "intermediate" gaits like a running walk or singlefoot?
Do you know anything about your filly's previous owners, what farm or area she came from, or either of her parents? Digging into anything you can find out about her past might get you some more concrete answers about what breed or breeds she is, and how tall you might expext her to grow.
Good Luck!
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