Novel Puzzle [Solved]

[Sidoh]

A woman is traveling with a wolf, a goose and a mouse. She must cross a river in a boat that will hold only herself and one other
animal.  If left to themselves, the wolf will eat the goose and the goose will eat the mouse.  How many crossing are required to get all
four creatures across the river alive?   

[Ergot]

3 round trips/6 crossings.

[Sidoh]

No.

[trust]

7

[Ergot]

3 crossings. You tie the goose to the boat because it won't die on the river.

[Sidoh]

Trust is correct!

It takes 7 crossings. 

Goose and back - 2
Wolf over - 1
Goose back - 1
Mouse over and back - 2
Goose over - 1

2 + 1 + 1 + 2 + 1 = 7