[skillya_glowi]

However their first design (in AO and AE) was without teeth, which means that they wouldn't've been able to handle meat or anything. In the Art of Oddworld somewhere there's a concept sketch of the inside of a Mudokon's mouth. The caption mentioned their diet being composed of mainly juices and softer foods. Since teeth were added it's hard to say, though. I'm going to go out on a limb and say they're omnivores, namely hunter-gatherers.