Miniature Fainting goats are small. Does will measure 22" and under at the withers at the age of 3 years old. Bucks will be a little larger at 23.75" and under at the withers. They will follow the same breed standard as the standard size goat. They are able to be utilized on smaller farms. They require less forage because of their small size. They require less of everything really related to their size. They are easy for anybody at any age to work with. A 70 pound goat can't pull you around like a 200 pound goat can.
Be very careful when you are purchasing a Miniature Fainting Goat because some goats just don't grow well and breeders sell them as a miniature. Later when these goats are breed you may have some large babies. It is always best to buy goats with Certified moms and dads. There is really no way to guarentee that 2 certified miniature goats will reproduce minature offspring but the chances are much higher.
There is a standard size Fainting goat. It will average over 22"-23.75" and will reach 25-28" maybe. Much bigger and they will not match the Fainting goat standard. This allows for the fact that we now have better nutrition and herd management.
Myotonic goats on the other hand are a larger, meatier goat. They are not the same breed;however, many will tell you that they are. Myotonic goats for the most part will not match the breed standard of the Fainting goat because the standard is designed for small to medium sized goats. The Myotonic goats have appeared over time as breeders have bred for the bigger goats. No body has yet to write a standard for the Myotonic breed. The Myotonic goats have been created from selectively bred goats. They are just one of the breeds that have come from the Fainting goat breed. The Miniature silkies and The Texas Meat Goat goat are a few of the other breeds derived from the Fainting Goats.