How can I separate sales of dropship and private brand products?

[BartM]

Hi Shopify community!

I have a ecom shop for cats and dogs and i seel based on a dropship method.
But I am expanding with the production of my own private branded products. I am looking for a solution to sell my own products internationally and seperatly from my other products.

So to put it simple and name my dropship products A and my private brand B.

I need a way that when an A product is in the shopping cart it is impossible to add B products, and the other way around aswell offcourse. This to avoid double shipping costs and to avoid order placements for my A products to international countries

The ultimate goal is to only offer Products from the B category and run my own warehouse.

Thanks in advance for your advice and solutions.

Kind regards

Bart from myhooman.be