Yeah, that one's hard. Here's an outline of what you need to do:
- Remove the bush, then use the goat and mouse to block the lower E teleporter so the elephant can walk down to the bottom area.
- Send the elephant into the lower E teleporter from the right, so that it ends up pushing the right-hand pipe leftwards.
- Hop the goat over the gap into the top-right area so she can help the elephant get back through the teleporter. Then the goat can jump back, so now all three animals are in the bottom area.
- With the help of the other animals, carefully position the mouse just above the arrow that points upward (this is the critical step!).
- Leaving the mouse in place, have the goat and elephant go up the central path together to the top-left area; along the way, the elephant will need to push the left-hand pipe leftwards.
- Using the goat and elephant in the top-left area, push the left-hand pipe back rightwards, and put the goat on the apple. Both pipes should now be in the center area.
- Without pushing the pipes, walk the elephant back down the center path. The mouse will prevent the elephant from running into the upwards arrow.
- From here, use the mouse to help the elephant get to the peanut. Then, with the two pipes still in the center, the mouse can walk to the cheese on its own.