my lamb needs to gain weight asap!!

[paisterryy]

i have a lamb that i use for livestock shows for ffa and i have a livestock show coming up in about 3 weeks and the minimum weight is 100 pounds. I just weighed him and he is 84 pounds. I started to add more grain to his feed a little while ago but i’m still afraid he won’t make weight in time. is there any tips or tricks to help them gain weight?

 

[Mini Horses]

Try some beet pulp shreds, alfalfa pellets & free choice hay. Can't up grain too much as it plays bad with stomach. The things I mention are forage, basically. Assume there's free choice minerals out.