Question
Is a mother-in-laws plant poisnous to pets i.e. Golden Retriever puppies????

Answer
Hi Becky
Yes, I think that mother-in-law tongue plants are poisonous.
In general, it is best to assume that all houseplants are poisonous to some degree and should be kept away from pets.
It is always better to err on the side of caution.
The safety of our pets should come first.
I hope this helps. If you have any questions or need additional information please don't hesitate to ask.
Thanks
Tracy