My two mares, Tanner and Magic, are almost impossible to tell apart without close inspection. If I'm standing right next to them, Tanner is -very slightly- smaller, and has more brown spots, while Magic has these scars on the insides of her back legs. But from across the pasture, that doesn't help.
Anyone have any ideas of how to differentiate one from the other? I don't keep halters or blankets or anything on them in the pasture, and I'd rather not cut a tail or mane short. So far, I've been using this neon green wax cow marker thing, and I draw a big 'M' on Magic's flank, and a 'T' on Tanner's, but it wears off pretty quickly, and I worry that reapplying that waxy stuff could be bad for their skin or stain their fur or something.
I've thought about getting one of those plastic collars they make for cows, but I'm not sure if it would be safe in the pasture or if they'd even work on horses.
My dad says to buy some hair dye and dye one purple, but I think that'd be taking it too far.