There aren't any Mudokons to save in Stockyard returns. Make your way through the level, to reach the real goal - Rupture farms 2.

E2P04C07:
Hoist up where you see the debris.
Edge forward, being careful to avoid the motion sensors. If you look to the platform above you can see the "Z's" of a sleeping Slog.
When you walk to the next screen, start to run as the Slog will wake up and chase you.

Jump on to the platform in the next screen. Then turn around and run all the way back, setting off the motion detectors on screen E2P04C06.
You must fall off the ledge and wait until the Slog is destroyed by the floating mine above before you return.

Now that floating mine has exploded you needn't worry about the motion detectors and can just walk through them.
Return to the ledge you jumped onto to escape the Slog.
Edge forward into the next screen.

Remain still to avoid the first pass off the motion detector.
Slowly make your way to the lever in the centre and pull it. Always make sure that your are still as the beams pass over Abe.
Now make your way slowly back to the left.

Jump off the platform and walk back to the right to get a rock, don't worry about setting off the motion detectors, although it is easier if you don't
Pick up the rock. and hoist back up.

Stand on the edge of the screen and throw a rock up by pressing the throw button and the left direction key, when the floating mine is near the mine on the ground just above you. You should hit one of the mines and explode both of them.
Now walk forward to the edge of the ledge and throw a rock by pressing 'throw' and the up direction arrow.
Collect two more rocks and walk on to the next screen.

Four floating mines make a quick circuit of the screen.
Crouch in the shadow of the tree and throw a rock in, if you are lucky you will explode them all, if not keep collecting and throwing rocks until all the mines have been exploded.
After you have destroyed the mines collect more rocks before continuing.

Run on to the next screen.
Climb over rock, run to keep ahead of the dog, when you reach the screen with the Slig, roll, to go through the tunnel.

Now jump up and walk right.
Chant to open the portal.
Throw rocks until the mines are exploded.
Now exit trough the portal.

 
 

E2P02C04:

Walk back into the left screen, as when you return the motion detector beams line up for a moment, making the first jump down easier.
This mine is harder to count, it is best to watch it for a while. Wait till you see it turn green then quickly deactivate it.
Make a running jump up on to the right hand platform.
Time it so that you set off the motion detectors.
A Slig will run in from the screen on the right.
Hoist up.
The Slig will fall into the pit.

Chant and the Slig will walk into the bombs on the left hand side.
Now jump down and pull the lever.
Make a running jump back up to the platform on the right.
Run to the next screen to get the attention of the slog.
Go back to the left, and jump back into the pit, and quickly up onto the platform to the left.
the Slog will run in and blow itself up on a mine.
Jump back down, jump over the mines, and walk into the next screen on the lower floor.
Lower down at the edge of the ledge.
Chant and exit through the portal.