If this option is not available to you then formulas such as organic goats formula. (breastfeeding-babies.com)
Despite this, we've received three iterations of the open world goat formula, with Goat Z [$ 4.99], Goat MMO Simulator [$ 4.99] and most recently Goat Simulator Waste of Space [$ 4.99]. (toucharcade.com)
Researching more we found that store bought goats formula (even the best) is not actually that great as you say! (freshly-grown.com)