Market goats should also be at least six months old (but can be up to nine months old) at the time of your fair. Target weights for goats will depend on the breed, but the acceptable range of finished weights is typically 60 - 110 pounds. For example, for fairs in September, look for a goat that was born no later than March.
Like market lambs and goats, market hogs should also be about six months old at the time of your fair. Once a market hog surpasses this age, you risk the animal becoming overweight. They will ideally weigh 210 - 300 pounds at the time of the fair, depending on the frame size of the animal. For example, if your fair is in late July, look for a hog born in late January.
The final target weight for your project animal will generally fall in the ranges listed above but will vary by animal. The date of your fair, the animal’s birthdate and its starting weight are just a few factors to consider when selecting your animal. Other factors to consider include structural correctness, muscling and balance.
Many fairs have a minimum and maximum weight to be eligible for exhibition. Most will require animals to be in exhibitors’ possession by a certain date, too. For details about the requirements of your fair, be sure to read the fair premium book thoroughly and watch for communications from your local Michigan State University Extension 4-H program coordinator for specifics.
Source : msu.edu