How big can a Golden Retriever mixed with Chihuahua grow up to?

It's impossible to say for sure how big a Golden Retriever/Chihuahua mix will grow without knowing the specific lineage and genetics of the parents.

Here's why:

* Golden Retrievers are large dogs: They typically weigh 65-75 pounds.

* Chihuahuas are tiny dogs: They typically weigh 4-6 pounds.

The size of the mixed breed puppy will be somewhere between these extremes. It's possible for a Golden Retriever/Chihuahua mix to be:

* Large: If the puppy inherits mostly Golden Retriever traits, it could be close to the size of a full Golden Retriever.

* Medium: More likely, the puppy will be a medium-sized dog, perhaps weighing 20-40 pounds.

* Small: In rare cases, a puppy could inherit mostly Chihuahua traits and be a small, compact dog.

To get a better idea of the potential size of your mixed breed puppy:

* Ask the breeder: If you got your puppy from a breeder, they may have an idea of its potential size based on the parents and previous litters.

* Consider the parents' sizes: If one parent is larger than the other, the puppy will likely be closer in size to the larger parent.

* Watch the puppy's growth: While it's hard to predict the exact size, you can usually get a good idea by watching how the puppy grows in the first few months.

Ultimately, the size of your mixed breed puppy is unique to them and their individual genetics.