Anyway, they came to live at DoubleHP when they were about a year and a half old. They were skin and bones and full of worms. 
But after a year of rehab, they seemed to be doing great. Especially Princess. She grew a lot. She is a really big horse. Prince didn't grow as much. And his mouth/teeth were slow in developing too. He has his teeth floated approx. twice a year. I can always tell when it's time. He'll be standing there looking kind of mopey when everyone else is enjoying their food. He'll start to drop weight. And then we get his teeth floated and everything's good (in his mouth anyway) for another 6 months or so.
Here is Prince. Looking very handsome yesterday as he always does.
When they were 3 (we waited, because they were so far behind in their growing), they were oh so nice and easy to train as riding horses. Prince even started going to shows! But then, little by little, signs of lameness. on and off. both of them. Princess first and then Prince. Xrays showed us what we feared. Princess is navicular, and Prince has arthritis. Really bad arthritis. We keep them as happy and comfortable as can be, and they will have an excellent home here with us for as long as their quality of life is good. They are just a joy to have around. and oh so beautiful. here they are playing yesterday, right before grain time.
UPDATE ON STAR: Star seems improved. She eats everything at night. She ate some straight alfalfa this morning, which she hasn't wanted to do probably because it is a little coarse and probably irritates the owie on her tongue. Normally of course this would be her first choice. But right now her first choice is something softer, so I am feeding her a grass/alfalfa mix which is really soft. She didn't eat everything in her stall this morning, but she ate enough. and drank and pooped. and I didn't see any drool or slime! So I let her go out with the herd for the afternoon. And I'll put her back in her stall tonight so I can observe her some more. I am not going to call the Vet for tongue Xrays so far. I think she is better, not worse. But we'll do some good observation tonight to be sure.