It only takes a couple of difficult births/ c-sections plus dead kids to wipe out the profit... Pygmies are more prone to difficult births as they are often fed a bit too much, and assisting is also difficult unless you have a toddler available with the right sized hands...
Our rule for smallholding is - no animals that has not at least TWO uses for ourselves as well as a sale value itself -- meat, wool/pelt, milk, guardian, eggs etc etc - has worked well. Even though we don't really make any serious money from any of them through sales we do eat VERY well...