is there any puja tht involves use of all 3 types - gold snake, silver snake and real snake?

Can you be more elaborate about this? May be telling in which connection you are asking
help others to answer your query.

Regards,
Raman Deep Singh

any dosh nivaran or shiv or nag puja tht uses all these 3?

This is similar or analagous to legal term Actual delivery and  symbolic delivery

In a physical or actual delivery, the seller actually takes the possesion,
In a symbolic delivery the seller symbolically takes delivery of the property or goods. For instance once the seller accepts the bill or Invoice or key or any other constructive act of delivery, he is said to have possessed the property symbolically

In the same way doing pooja with gold and silver snake is symbolic , while real snake is actual

For Sarpa Shanti or KaalSarpa Shanti, snake made of Gold/Silver is generally used for donation. It should be donated to the Priest who is offering the Puja. The real snake (along with snake made of Gold & Silver) looks interesting. I have never heard of it. Just check this with someone who is knowledgeable in Yadniki (Holy Offerings).

By donating Money, Precious Metals, Cow, Clothes, Food one can warn off the evils from their Horoscopes. There are many thoughts and objections to it. I don't want get into it.

But to be on safer side get more explanation from the Priest on all the 3 snakes and their roles in Puja, especially the real snake!!!

If its just for feeding the snake with milk then I feel pity on the snake as I know snakes don't eat/drink milk. The charmers/owners of snake keep them hungry for 2-3 days, then they drink milk, otherwise snakes eat Rats and Frogs only. Since we cannot offer them these animals in any of the Ritual as its against the structure of the Ritual, we feed them with milk.