Thank you, yes i have a wonderful vet will have a chat with her soonI am a vet, and in my opinion, it is better to be spayed most of the times. Specially before the first heat cycle to avoid 98% of cancer and pyometra...But this decision is up to you. Some little dogs start their cycles later, until 1 year old. If you want to castrate her one day, better do it earlier as possible.
But it must be done by a very reliable vet. Some vets are not comfortable with tiny dogs, so make sure they do surgeries on little puppies or tiny dogs.
Your babies are so cute !!