Breeding older gyps

EXCUSE THE CAPS BUT I AM PECKING WITH ONE HAND. THIS IS A 12 YR. OLD GYP. I HAVE ONLY BRED HER THREE TIMES MAINLY BECAUSE I DIDNT WANT TO LAY HER UP AND THEN IT WAS MOSTLY IN HER LATER YEARS. SHE IS A EXCEPTIONAL RIG DOG AND TRAIL DOG. MOST OF MY DOGS RIG BUT SHE RIGS SUPER COLD TRAILS AS WELL. SHE WAS A REALLY FAST DOG THAT THROWS SPEED DOGS THAT CAN TRAIL FAST AND WHEN A HOG OR BEAR IS JUMPED, THAT GETS AHEAD OF MOST DOGS. SHE HAS NOT COME IN HEAT IN THE LAST 2 YEARS AND NOW SHE IS IN AND I AM BREEDING HER TO MY HILLBILLY DOG THAT HAS A LOT OF HER CHARACTERISTICS. GOOSE, HILLBILLY IS OFF OF JACK ALSO AND A REAL NICE DOG. SHE SLOWED DOWN TOO MUCH BY THE TIME SHE HIT 9 1/2. SHE COULD STILL GO FIND A HOG BUT COULD NOT STAY IN THE RACE. MOSTLY WHAT I USE HER FOR NOW IS IF MY 4-6 MONTH PUPS CANNOT FIND THE HOG IN MY 25 ACRE PEN, I PUT HER IN AND USALLY SHE HAS THE HOG JUMPED IN 10 MINUTES OR LESS.
I HAVE ANOTHER GYP THAT IS IN HEAT THAT I AN ALSO BREEDING. IF FOR SOME REASON THE OLD GYP HAS NO MILK I CAN PUT THE PUPS ON THE OTHER DOG.ALSO IF LABOR SEEMS TO MUCH, I WILL HAVE A C SECTION DONE TO REDUCE STRESS ON HER.