Question
are avocado seeds poisonous?

Answer
Briahna,
Thanx for your question.  Humans do not ingest avocado seeds so I'm not sure where you are going with this.  I suppose if a baby were to bite on the seed that might be a cause for concern.  However, all of my research indicates the seed is not outwardly toxic to humans but can be very toxic for many types of animals such as goats, fish,, birds and other animals.  I do not recommend that human beings ingest the avocado pit.  It has no nutritive value that I have been able to discern.  I hope this helps.
Tom