I've never had a dog ingest a bit of plastic like a poop bag, but I've had some things that could have caused real trouble come through.
One of my horses used to get silicone under pads when she was shod. This is done by shoeing the horse with a standard leather or rubber pad over the sole of the hoof then pumping silicone between pad and sole. When those shoes were worn and came off, the farrier would just throw them aside. Neither he nor I ever considered that my dog, who like all dogs was crazy over bits of hoof, would eat one of those pads. She did, and I didn't even realize it until I saw one of those pads sticking up out of a pile of poop. She was a small Rottweiler, but that pad was at least half an inch thick and probably a 4 or 5 inch oval.
Not a dog, but one of my cats once ate a decorative cord from a blouse at least 18 inches long. According to my vet the most dangerous thing they can ingest is any kind of string. Again, I didn't know she'd done it until it started coming out, and she passed it all without intervention.
I'd think something as small and of such thin plastic as the piece of bag you describe would be very hard to identify in poop all scrunched up and so covered with the fecal matter the color might not show. I'd just do what the vet says and keep a sharp eye on her for any sign of digestive irregularity or distress from here on out. Also, like me with my dog and cat, now that you know she'll swallow such a thing, get real careful about making sure nothing like that is ever again available.
One of my horses used to get silicone under pads when she was shod. This is done by shoeing the horse with a standard leather or rubber pad over the sole of the hoof then pumping silicone between pad and sole. When those shoes were worn and came off, the farrier would just throw them aside. Neither he nor I ever considered that my dog, who like all dogs was crazy over bits of hoof, would eat one of those pads. She did, and I didn't even realize it until I saw one of those pads sticking up out of a pile of poop. She was a small Rottweiler, but that pad was at least half an inch thick and probably a 4 or 5 inch oval.
Not a dog, but one of my cats once ate a decorative cord from a blouse at least 18 inches long. According to my vet the most dangerous thing they can ingest is any kind of string. Again, I didn't know she'd done it until it started coming out, and she passed it all without intervention.
I'd think something as small and of such thin plastic as the piece of bag you describe would be very hard to identify in poop all scrunched up and so covered with the fecal matter the color might not show. I'd just do what the vet says and keep a sharp eye on her for any sign of digestive irregularity or distress from here on out. Also, like me with my dog and cat, now that you know she'll swallow such a thing, get real careful about making sure nothing like that is ever again available.
