She was happily gnawing on her raw marrow bone, I happened to glance over at her and she had managed to bite off a rather large, thin piece of bone, she saw me coming, ran away and swallowed it...
Probably a good 1.5" by the looks of the rest of the bone. I'm a little worried now: can dogs digest these? I'm concerned she'll perf her bowel or get an obstruction.

Freya ate one a couple of weeks ago. I was worried as well. I gave her a few hours of just observation. But then next day her morning BM was full of little bone bits. I was really impressed.

Just watch her for a while and see if there is anything indicating she's in pain or having trouble pooping.

Cato swallowed an entire Duck neck whole two weeks ago- the entire think is 6 inches longer and has a bone all the way down the middle.

you would think it never happened, I never even saw fragments.

Don't worry too much. Just watch and if you see anything questionable go to your vet.

When Freya was 8 weeks old she swallowed a whole Chicken neck. It scared the bajezus out of me, but she was fine. Would never have known it happened.

She should be alright, they're surprisingly good at breaking them down! I find the best thing to do when you spot something like that is just to observe, because if you go over, thats exactly what they do, run away and swallow the damn thing! Luka has swallowed all sorts of things whole before just because he thought I was going to take it off him lol!

Thanks, I feel alot better now after those stories. She had a normal poop today and seems fine. Of course, today I had my back turned for a few seconds and she got her paws on a bowl with an apple core (bad, I know, I hope the seeds will pass through undigested), which she swallowed whole, and some cherry pits. Sigh, she'll eat anything and everything . Once she pooped out a Taco Bell fire sauce packet. I could go on and on...