Indistinguishable?

If you prick us, do we not bleed?

Perhaps the sceptic about the F-eng machine should hold out
for R-eng machine, made out of the right stuff,

Turing-indistinguishable both inside and out
at both the macro and micro levels.  

But would we be right to kick robots that donŐt bleed,
because we infer that they therefore donŐt feel?