Disgusting Oozeling is a possible item inside Oozing Bags which drop off off various high-level oozes in Felwood, Un'goro Crater, Eastern Plaguelands, Western Plaguelands, Ruins of Ahn'Qiraj, and Naxxramas. The following are the known oozes it can come from:
- Felwood – Tainted Ooze, Vile Ooze, The Ongar
- Un'goro Crater – Glutinous Ooze, Cloned Ooze, Gargantuan Ooze
- Eastern Plaguelands – Living Decay, Rotting Sludge
- Western Plaguelands – Vile Slime, Large Vile Slime, Devouring Ooze
- A Disgusting Oozeling projects an when it accompanies its owner which reduces the owner's defense by 20 and all resistances by 20, and colors its owner green as if the owner were poisoned.
- The drop rate of the bag varies between 1.0% and 3.5% depending on the source, and the chance that the pet is inside the bag is roughly 1.5%. This puts it at a similar rare status to the whelpling pets, and thus can sell for fairly large amounts of gold on the Auction House, at least as far as pets are concerned.