Additionally, couldn't MSR results simply be produced by mirror neurons firing? I.e., touching a marked part of the body does not mean "Animal in the mirror is

Additionally, couldn't MSR results simply be produced by mirror neurons firing? I.e., touching a marked part of the body does not mean "Animal in the mirror is me", it can simply mean "Marked part of that animal is 'itching' me"? Are there MSR tests that used windows to other animals instead mirrors as a control?