I have had my new boy for 10.5 weeks now. When I first got him he was mildly underweight by about 50-100 pounds and lacked a lot of muscle tone. After the first 10 days I had him he came down with a stone bruise so wasn't worked, then, he needed his teeth floated so we lost another few days of "good" work due to head tossing and fussing. He was on only 3 quarts of grain per day and two flakes of hay twice a day when I got him. I upped him, over a period of 4 weeks, to 4 quarts of grain + 4 quarts of pellets per day, plus 6 cups of rice bran pellets per day. He is also now getting 6 flakes of hay per day with an added two flakes at night for his "snack."
Pic 1 is the day I brought him home on 22 Jan. 2nd pic was exactly 5 weeks later on 26 Feb. Pic 3 was taken tonight, 10 weeks and three days later.