Any guesses as to what this flower was?

My cat just had a seizure and the vet thinks it was likely from a toxin of some kind since she has no history of seizures. I looked around the house and it looks like she might have gotten into this bouquet I got two weeks ago and is now long dead. I am aware I should be much more careful with what kinds of plants and things I bring into the house in future. I’m just curious if anyone thinks they might be able to identify this plant even though it is long dead? I tried to visit the store where the bouquet was bought but they said they get different flowers in every week and there’s no consistency, so I didn’t find any bouquet that looked like this one. First two photos are the flower that it looks like she might have actually gotten into and third photo is of the whole bouquet (white plant I have identified as a Chrysanthemum which is unlikely to cause a seizure but not out of the realm of possibility, other one is baby’s breath which I know can cause gastro upset). Please note I do feel absolutely awful about this and I will be much better about flowers in the house in future, I only want to identify the plant.