At what point does the weight gain slow down? We're averaging just under 4 1/2lbs per week. Buster has gone from a skinny 20.4lbs when we brought him home at 9 1/2 weeks to a still thin 47.2lbs today at 15 1/2 weeks. Continuing at this rate, he'll hit 200lbs before his first birthday...I dont mind, I just want a healthy pup. He was under weight when he came home due to a "massive parasite load" (according to the vet, she's never seen a dog with that many eggs in a stool sample). Wormed him at his first vet visit (cant recall what she gave him off hand). 3 weeks later I had him rechecked due to diarrhea and we started Panacur. We started round 2 of Panacur this morning, round 3 will be done 2 weeks after we stop this one....the idea is to kill off all the life stages. He eats between 4 and 6 cups of Exclusive large breed puppy chicken & rice spread out over 3 meals...not every meal is finished. Treats very from day to day, the only constant is his large milkbone at bedtime (lure/reward for sitting while I put up the baby gate).