i was told years ago that a spray called bitta apple is suppose to work...it didnt work on my sistas eng bully but it worked on my m8s dog.

u could even try kongs and fill them wiv somethin tasty....give it to ur rotty if its on the move looking for sommink to chew or if u go out...i got mine one of them balls they roll around and filled them wiv complete..kept them occupied for hours it did...even wen it emptied they kept rolling it expecting treats to fall out lol.

so really all i suggest is toys that will keep her occupied...mainly food filling sorts