Food & HealthTips & Facts

Can a Chihuahua Get Pregnant by a Large Dog?

Many people are curious about whether or not can a chihuahua get pregnant by a large dog. Large dogs may really impregnate smaller dogs. By concept, a dog of every size could get pregnant by a dog of every size. However, it can be a bit more complicated than that when you consider each dog’s anatomy. So to help you understand how possible it is, let’s break it down a little bit.

Reproductive Cycle of Female Chihuahuas

The reproductive cycle of the female chihuahua is pretty interesting. A chihuahua can go into heat as early as four months old, but most wait until they are around six months old. The average length of a heat cycle for a chihuahua is about three weeks long. But, it can range anywhere from two to four weeks. So, if a chihuahua is bred during her heat cycle, she can become pregnant.

Now, let’s move on to the male dog. The reproductive cycle of the male dog is quite different from the female chihuahua. Male dogs can mate and impregnate a female dog at any time. However, they are most fertile during the winter months. It is because the length of daylight affects the male dog’s hormones. So, if a chihuahua is bred during winter, she can become pregnant.

A veterinarian may do blood tests and vaginal smears before the estrous cycle and continue during the estral period to ensure that breeding is proceeding at the best time. It is also important to ensure that the female chihuahua is not pregnant before breeding her. This can be done with a simple x-ray.

Reproductive Capacity

Dogs remain reproductive well into their advanced years, both males and females. But, the reproductive capacity of each dog can vary greatly. Depending on the female chihuahua’s age during the first breeding, it is traditionally considered ideal to breed her for the first time during maturity but no earlier than its 2nd or 3rd heat cycle.

Small breeds like Chihuahuas may be bred early than larger breeds since they mature relatively quickly. But, it is still best to wait until they are at least two years old. Their bones and organs are still growing and can be easily damaged if they get pregnant too early.

Litter size often reduces as your female Chihuahua ages. Female Chi is more prone to produce small litters and has labor difficulties beyond seven. According to veterinarians, they often shouldn’t be reproduced beyond that age.

Can a Chihuahua Get Pregnant by a Large Dog?

Can a Chihuahua Get Pregnant by a Large Dog?

Now that we’ve gone over the reproductive cycles of both the male and female chihuahua, you may be wondering if can a chihuahua get pregnant by a large dog. The answer is yes, but it’s not recommended. It is because the size difference can cause problems during pregnancy and delivery. The larger the size difference, the greater the risk. So, if you’re thinking about breeding your chihuahua with a large dog, it’s best to talk to your veterinarian first. Here are some risk factors for breeding dogs with large size differences:

➥Mismatch in Genitalia Size 

The biggest risk factor for breeding dogs with large size differences is the mismatch in genitalia size. It can cause mating problems, leading to injury or even death. When the male dog’s penis enters the female dog’s vagina, it can get stuck. It can cause tears in the vagina, which can lead to infection. In severe cases, the female dog may need to be spayed.

➥Differences in Body Size 

This can cause problems during pregnancy and delivery; the smaller the dog, the greater the risk. It is because the smaller dog’s body can’t handle the pressure of the larger dog’s body during pregnancy. It can lead to health problems for both the mother and the puppies.

➥Differences in Birth Weight 

The smaller dog is at risk of having smaller puppies, which can be born premature or stillborn. It is because the smaller dog’s body can’t provide enough nutrition for the growing puppies.

Due to the fact that Chihuahuas must only breed with canines of a similarly sized, their options are sometimes limited to other Chihuahuas and toy-sized pooches. They are more likely to sustain injuries during and after breeding if they breed with bigger canines. Usually, a C-section will be required to deliver their puppies.

If you’re thinking about breeding your chihuahua with a large dog, it’s best to talk to your veterinarian first.

Possible Dog Breeding Conditions

Insemination or breeding at the wrong point in the female chihuahua’s estrous cycle, or, to put it simply, whenever the female dog is not completely in heat, is one of the most frequent causes of dog reproductive problems. In contrast to other canine fertility problems, this one may be resolved by keeping an eye on a female dog’s heat cycle and permitting mating only while she’s at its most fertile.

There is a greater incidence of dog reproductive problems in some breeds because certain breeds are susceptible to thyroid deficiency. The conditions might affect dog breeding:

📌Low Semen Count 

This breeding condition can be caused by the male dog’s age, weight, health issues, or even his environment. A low sperm count can make it difficult to impregnate a female dog.

📌Subclinical Uterine Infections

An infection of the reproductive tract can make it difficult for a female dog to get pregnant or carry a pregnancy to term. These can often go undetected in the early stages. If a female dog has this infection, it can make it difficult to get pregnant or causes miscarry. However, it can be treated with antibiotics.

📌Brucella Canis

It is a bacterial infection that can cause infertility in both male and female dogs. It can also be passed from a pregnant dog to her puppies, causing them to be stillborn or have birth defects. The good news is that this disease can be vaccinated.

📌Canine Herpesvirus

It is a virus that can cause abortion in pregnant dogs and stillbirth or birth defects. It can also infect puppies, causing them to die. This virus can be passed from mother to puppies during pregnancy or childbirth.

📌Toxoplasmosis infection

It is an infection that can be passed from cats to dogs. It can cause abortion in pregnant dogs and stillbirth or birth defects. This infection can also be passed from mother to puppies during pregnancy or childbirth.

📌Hyperadrenocorticism (Cushing’s Disease)

Hyperadrenocorticism, or Cushing’s disease, is a condition that can cause infertility in both male and female dogs. It can also cause abortion in pregnant dogs. This condition can be treated with medication.

📌Abnormal Ovarian Function

Female chihuahuas can have problems with their ovaries, making it difficult for them to get pregnant. These problems can be caused by various things, including infection, tumors, or cysts. This condition can often be treated with surgery.

📌Chromosomal Abnormality

An abnormality in the chromosomes can cause infertility in both male and female dogs. It can also cause abortion in pregnant dogs and stillbirth or birth defects.

📌Protozoal Infection or Systemic Viral 

Protozoal infection is an infection that can be passed from mother to puppies during pregnancy or childbirth. It can cause abortion in pregnant dogs and stillbirth or birth defects. Systemic viral infections can also be passed from mother to puppies during pregnancy or childbirth and cause the same problems.

📌Inadequate Copulatory Stimulation

An inadequate amount of copulatory stimulation can cause a female dog to have difficulty getting pregnant. It can be caused by several things, including the male dog’s age, health, or weight.

There are some other conditions that can cause infertility in dogs, as well as abortion, stillbirth, or birth defects. If you are having trouble getting your chihuahua, or if she has had multiple miscarriages or stillbirths, it is important to talk to your vet about possible causes and treatment options.

How to Breed Your Chihuahuas

Chihuahua mother with its pups

If you are planning to breed your Chihuahuas, it is important to do your research and talk to your vet about the best way to go about it. There are many things to consider, including the age, health, and weight of both male and female dogs. You will also need to ensure that both dogs are up to date on their vaccinations and have been checked for any genetic conditions that could cause problems. Once you have all this information, you can start planning your breeding program. So here are the steps to take in breeding your chihuahua.

✔️Find a Breeder

The first step is finding a reputable breeder to help you with your breeding program. A good breeder will be able to help you choose the right dogs for your program and will also be able to provide you with information on how to care for your dogs and puppies.

✔️Assess Your Chihuahua

Is your chihuahua ready to be a mother? A few things to consider when assessing your chihuahuas, such as her age, health, and weight. You will also want to ensure that she is up to date on her vaccinations and has been checked for any genetic conditions that could cause 

✔️Plan Your Breeding

Now that you have found a breeder and assessed your chihuahua, you can start planning your breeding program. You will need to decide how many puppies you want to produce, what type of breeding program you want to use, and what environment you want to raise your puppies in.

✔️Breed Your Chihuahua

The next step is actually to breed your chihuahua. It can be done by artificial insemination or by natural mating. If you are using artificial insemination, you must collect a sample of the male dog’s sperm and then insert it into the female dog’s vagina. If you use natural mating, the male and female dogs will mate naturally, and then the puppies will be born nine weeks later.

✔️Raise Your Puppies

Once the puppies are born, you will need to raise them properly. It includes feeding them a nutritious diet, providing plenty of exercise and socialization, and teaching them basic obedience commands. You will also need to keep an eye on their health and ensure they get all of their vaccinations on time.

Pregnancy Signs to Look For

If you think your chihuahua might be pregnant, there are a few signs to look for. These include:

❕Tired and Lethargic

Like humans, pregnant Chihuahuas can often feel tired and lethargic. If your chihuahua is suddenly sleeping more than usual, it could be a sign that she is pregnant.

❕Upset Stomach

Another common sign of pregnancy is an upset stomach. It is like a morning sickness that can make your chihuahua nauseous and cause vomiting.

❕Weight Gain

Of course, one of the most obvious signs of pregnancy is weight gain. If your chihuahua starts to put on a few extra pounds, it could be a sign that she is pregnant.

❕Enlarge Stomach

As the puppies grow, your chihuahua’s stomach will start to enlarge. It can be one of the first signs that she is pregnant and can often be seen as early as four weeks into the pregnancy.

❕Nipple Enlargement 

Another sign that can be seen as early as four weeks into the pregnancy is nipple enlargement. This is caused by the increased blood flow to the area and can often be one of the first signs that a chihuahua is pregnant.

❕Nesting Instincts

As the due date approaches, many pregnant chihuahuas will start to display nesting instincts. They will start preparing a nest for their puppies by collecting blankets and toys.

If you think your chihuahua might be pregnant, it is important to take her to the vet for a check-up. It will help to confirm the pregnancy and can also help to ensure that both the mother and puppies are healthy.

Frequently Asked Questions

What happens if my chihuahua gets pregnant by a big dog?

If your chihuahua gets pregnant by a big dog, she is at risk for several problems, including abortion, stillbirth, or birth defects. Additionally, she may have difficulty getting pregnant in the future.

How can I tell if my chihuahua is pregnant?

There are a few signs that you can look for to tell if your chihuahua is pregnant, including a change in appetite, nesting behavior, and weight gain. Additionally, you can have your vet perform a blood test or ultrasound to confirm pregnancy.

Can puppies be bigger than their parents?

Yes, puppies can be bigger than their parents. It is because they inherit genes from both parents, and the mother’s size determines the size of the litter.

What should I do if my chihuahua is pregnant?

If your chihuahua is pregnant, you should take her to the vet for a check-up and ensure she is healthy. You will also need to provide her with a nutritious diet and plenty of exercise. Additionally, you should be prepared for some behavioral changes, such as nesting behavior and increased vocalization. Finally, you should ensure that she has a comfortable place to deliver her puppies.

Does the male or female dog determine the size of the puppies?

The size of the mother determines the size of the puppies. The father’s genes can influence the litter size, but the mother’s genes ultimately determine how many puppies are born.

Final Thoughts

So can a chihuahua get pregnant by a large dog? As discussed in this article, it is possible but risky for both the mother and the puppies. As a pet owner, you might want to have the best mix of puppy breeds possible. But always err on the safe side. Thus, only breed your chihuahua with the same or similar size dog to avoid potential health risks.