Chihuahua Lab Mix Full Grown Size – Exactly How Big Do They Get?

Last Updated on November 11, 2023 by Linda Richard

Crossbreeds between large and small dogs are always fascinating and that’s the case with the Chihuahua lab mix full-grown size – exactly how big do they get? Mixes like the Labrahuahua can be real head-scratchers and even seem impossible at first. Can Labradors and Chihuahuas even mate successfully? And, if they do, what kind of a dog can you expect for a lab Chihuahua mix? We’ll explore all that below.

Chihuahua Lab Mix Full Grown Size

If you get a Chihuahua and lab mix puppy you can’t really be sure how big it’s going to get. This is normal for crossbreeds between different-sized dogs and isn’t unique to the Labrahuahua.

To give you some idea as to what you can expect, the weight of an adult Chihuahua and lab mix can be anywhere between 25 and 50 lbs (11 and 23 kg). That’s potentially a 100% weight difference between two different Labrahuahuas. Height-wise, these dogs can grow to either 10 or 22 inches (25 or 56 cm) which is also a double difference.

 chihuahua and lab

Read more about: When Is A Lab Full Grown and How Quickly Will Your Pup Turn Into A Dog?

Can You Guess The Chihuahua Lab Mix Full-grown Size From An Early Age?

You can, to a certain extend. The way to go about is pretty intuitive – you’d need to:

  • See the Labrahuahua’s parents and see how big they are. Both Labradors and Chihuahuas can also vary quite a bit in size so two smaller parents will likely mean a smaller puppy.
  • Compare the size of the puppy with the rest of its litter. It’s likely that your pup has siblings so it’s a good idea to see if it is smaller or bigger than the rest.
  • Compare your puppy with purebred Chihuahua and Labrador puppies of the same age. We can’t really give you a solid Chihuahua lab mix growth chart but if your 3-month-old Labrahuahua puppy is closer in size to a 3-month Chihuahua than it is to a 3-month Labrador, it will probably be on the smaller side when it grows up.

How Is A Chihuahua Mix With Labrador Even Possible?

It often isn’t. There are quite a few conditions that need to be met for a Chihuahua and a Labrador to successfully reproduce in a natural fashion:

  • The Chihuahua has to be big and the lab – as small as possible (without suffering from dwarfism, of course). The average height for a Chihuahua is usually between 6 and 9 inches (15 and 23 cm). However, some rare dogs can grow as high as 12 and even 15 inches (30 to 38 cm) – these would be ideal for a cross with a lab. On the other hand, standard Labradors usually vary between 21 and 25 inches in height (53 to 64 cm). So, a 15 inch (38 cm) and a 21 inch (53 cm) would be the ideal combination.
  • The Labrador has to be female and the Chihuahua – male. If the lab is male and the Chihuahua is female then the size difference will make copulation physically impossible. The even bigger problem would be the birth of a puppy, however. A female Chihuahua trying to give birth to puppies that are two times larger than normal can be disastrous for the dog. On the other hand, a large male Chihuahua with a small female Labrador can be a workable combination.
  • The female Lab has to really be ok with it. Even in heat, a lot of female dogs will refuse to consider a male that’s two or more times smaller than them. The larger the Chihuahua is, the better, but even then the Lab may refuse and wait/look for another candidate.
  • Then again, there’s always the option of artificial insemination. This way, the size of the parents isn’t really important. The female will still need to be a Labrador for a safe and issue-free birth but that’s about it.

Learn more about: When Is A Mini Lab Full Grown and How Big Does A Miniature Labrador Get?

How Can You Monitor The Growth Of Your Labrahuahua?

Without a concrete growth chart, it’s hard to say exactly how big a Chihuahua and Labrador mix should be at a given age. The reason we can’t really give you such a chart is that the mixed puppies can vary too much in size.

The general rule of thumb with all crossbreeds is that they can be almost as big as their bigger parent (the lab, in this case) and almost as small as their smaller parent (Chihuahua). So, a large Labrahuahua cross will be about 90-95% the size of a standard lab and a small cross will be 105%-110% the size of a standard Chihuahua.

So, you can just get the growth charts of standard labs and standard Chihuahuas and juxtapose them with each other. Here’s a quick example that covers the height of both Labradors and Chihuahuas:

Age Labrador Average Height Chihuahua Average Height
3 months 10 to 15 in (25 to 38 cm) 3 to 4 inches (7.5 to 10 cm)
5 months 12 to 18 in (30 to 46 cm) 4 to 5 inches (10 to 13 cm)
7 months 15 to 19 in (38 to 48 cm) 5 to 8 inches (13 to 20 cm)
9 months 20 to 23 in (51 to 58 cm) 6 to 9 inches (15 to 23 cm)
11 months 21 to 25 in (53 to 63.5 cm) 6 to 9 inches (15 to 23 cm)
13 months 22 to 25 in (56 to 63.5 cm) 6 to 9 inches (15 to 23 cm)
15 months 22 to 25 in (56 to 63.5 cm) 6 to 9 inches (15 to 23 cm)

As you can see, standard Chihuahuas reach a full size between their 6th and 9th months while Labradors can keep growing after their 1-year birthday. When your labrahuahua is going to stop growing will depend on which parent it looks more like.

 chihuahua and lab mix

How Can You Know If Your Labrahuahua’s Growth Is Normal?

Given that the ranges are so wide it’s hard to say if your puppy is just larger/smaller than average or if there’s something to worry about. With crossbreeds, it’s always advisable to just consult with your vet more frequently. Things such as Insulinoma or Hyperthyroidism can lead to an overgrown puppy but your Labrahuahua can just be closer to its lab mom. Similarly, Intestinal worms or other parasites can stunt a pup’s growth but it could also be that you’re going to have a smaller Labrador/Chihuahua cross.

Learn more about: Labrador Weight Chart By Age and Its Many Advantages

Linda Richard

I know that all dog breeds are different, but Labradors exude a special energy, don’t they? I believe everyone deserves the unconditional love of a pet, so my main goal is to make sure you can experience it.

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