I had to look on Google to see what a Flossie was; like a hide chew only tendon.
My springers had huge hide chews (cow's legs we used to joke, because of the size) and so Monty and Izzy got smaller ones too. However, Monty will swallow a chew when it gets to a certain size (rendering the chews, sold by the vet useless, as softening them made them almost immediately swallow size) and gagged alarmingly sometimes, when the soggy item got stuck part way.
I used to assume that , as they were digestible, they were sure to go down (as Monty's did) but later got to know of fatalities.
Now the boys get munchy minty sticks, made from tiny pieces of hide in starch . There are a few rolled up (cigar or wrapped then rolled larger ones-I would never give the bone shapes, whose 'knuckles come away easily, or the novelty shapes) about, which Teddy gnaws on, now and then, but he soon gets tired of them , so they'll be easy to throw out when they get near danger size. Unlike Monty, he only shears off tiny pieces, too small to harm.