It may very well be something she ate.
We used to butcher extra steers and they were delish.

But I know that some stuff can give meat a really off taste.
Killed a 'nuisance' bear once, and tried to eat it, but it had been
eating fish and was practically inedible.

And one time some brainiac at our University got the bright idea
of finishing hogs on -- fish meal ! OMG. The bacon was DISGUSTING.
They quietly withdrew it all from the market and never tried that again.

Not sure what vegetable matter could give meat such a funky taste
but eucalyptus probably could if anything can. If you don't trust how
the meat was treated, then you'll have to do it yourself and see if there
is any difference.