Adult weight or mature weight? The lines I have are slow to mature so their weight as a young adult is different from when they mature. Esa is about 64lbs she is 3 and mature ,at a year of age she was about 55 lbs,now on the other hand,my Bubba was maybe 58 at a year but when he turned 3 and was fully mature he was 70lbs but not fat just filled out. You can see the difference in the photo gallery the photo I use as the Avitar was taken when he was 17 months old and the other show photo he was almost 3. Big difference. Most times this doesn't have to do with how they eat but how they mature,the genitics.