Help... my litter trained Chihuahua won't go in her boxes! I do not know what the problem is as nothing has changed as far as the box cleaning schedule, etc... she never not went in her box. All of a sudden she just does not like using her litter boxes and I do not know what to do! Has anyone else had this problem? P-Nut is 1 1/2 and has been GREAT up until recently... did not have a problem training her, etc. so we have no idea what the deal is now. Any help would be great! THANKS!!!