This will help explain things it's from ASPCA, baby's breath is non toxic to cats and dogs. https://www.aspca.org/pet-care/animal-poison-control/toxic-and-non-toxic-plants/babys-breath
It happens. Most of the time it will pass through the animal, with no problems. Just keep an eye on him/her if they decide to stop eating or other odd signs that aren't normal.
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