How big do blue heeler rat terrier puppies get?

There's no such thing as a "blue heeler rat terrier puppy." You're likely referring to a mix of two breeds:

* Blue Heeler (Australian Cattle Dog): These dogs are medium-sized, typically weighing 35-50 pounds and standing 17-20 inches tall.

* Rat Terrier: These dogs come in two sizes:

* Standard: Weighing 25-35 pounds and standing 13-18 inches tall.

* Miniature: Weighing 10-18 pounds and standing 10-13 inches tall.

Since you're dealing with a mix, it's difficult to predict the exact size of the puppy. However, you can expect it to fall somewhere between the size ranges of its parent breeds.

Here are some factors that can influence the size of a mixed-breed dog:

* Genetics: The specific combination of genes from each parent breed will play a major role.

* Nutrition: A well-balanced diet can help the puppy grow to its full potential.

* Exercise: Regular exercise can contribute to healthy growth.

To get a better idea of the potential size, it's best to ask the breeder or rescue organization about the parents' sizes. They may also have information about previous litters from the same parents.