What is the name of your state (only U.S. law)? Wisconsin.
My sister, due to poor planning, did not make living arrangements after her lease expired. She moved in with friends, but her friends were allergic to cats - so she asked me to hold on to her cat for her for a period of 3 months. And I, due to poor planning, left my $1600 MacBook out where one of the cats--unsure if it was my cat or hers--scratched it. Who's liable?