Watch her carefully, but I'll tell you one reassuring thing: the St. Bernard we had when I was in high school once ate an ENTIRE chicken that had been thawing on the countertop when I was home by myself with her. I went in to take a shower, and when I came out, my mother had come home. She said "where'd you put the chicken?" and I thought SHE had put it somewhere, because there was the nice, clean platter sitting on the counter. Only upon closer examination to we realize that there were a couple of dog hairs stuck to the platter ...
and guess who didn't eat much of her own dinner that night! (I think the humans ended up having pizza.)