LOL
A friend of mine sent me that, it is so funny and it could apply to rats as well.
The laws of German Shephard Property
1 If it is in my mouth, it's mine.
2 If I like it, it's mine.
3 If I can take it away from you, it's mine.
4 If I ever had it, anytime, it's mine.
5 If I am chewing something up, all the pieces are still mine.
6 If it looks at all like anything that is mine, it's mine.
7 If it is mine, it must never appear to be yours in any way.
8 If I saw it first, it's mine.
9 If you are playing with anything and later put it down, it's mine.
10 If it is broken, it's yours.