Do you and your daughter use flax seeds, or could they be in any bread or cereal that you eat, or colon cleansing products? I was giving a colonic
today and saw seeds similar to what you described...and thought about your post. This person confirmed that they take whole flax and that is what it was. Even if you used flax previously you might see them with a flush because if you have any diverticuli (very common, little pockets in the colon) the seeds can get caught in them until something flushes them out. The increase in water absorbed into the colon when using Epsom Salts
could wash out the pockets.
Just a thought...