PACK DONKEYS

Right outside the gates to Suran, you will find a packdonkey seller with three donkeys for sale. Buy as many of them as you like. The packdonkeys are using a script based on Grumpy's latest warping scripts, so they are excellent at following. Thanks to a special ring, they can also recall to you (exteriors only). They are peaceful animals, so they won't join you in battle unless they get directly attacked.

Others:

If you levitate, the donkeys will be there when you get back. They swim... Sort of. And they have the water breathing ability.

You can heal the donkeys with healing potions if you have them in the inventory. But as they aren't fighters, this probably won't be necessary They level (sort of). Their attributes will be set to match your level on initial meeting. After that a check will be made every time you sleep to adjust stats. This happens automatically. No message boxes. Health % can be determined via dialog.