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Sirius Canine Fertility’s Tips for Importing Frozen Semen from Another Country

January 30, 2026 By Arabelle Leave a Comment

Thank you for considering us for your canine semen import. We are frequently asked “how much semen should I ask for” or “what is a breeding unit”?

These questions can be confusing, especially since there is no real standard between countries or even between veterinarians.

The following are the requirements we would like for our clients, to obtain the best chances for successful breeding.  These parameters are optimal, but it is certainly understandable if you are purchasing semen from a deceased stud dog, or if the semen is in short demand, to need to work with smaller numbers.

Semen is frozen by different methods, resulting in either “straws” or “vials”.  Vials are simple math, as they are usually divided into individual breeding units. One vial= one breeding unit.

Straws are generally 0.5 ml straws with a set amount of sperm in each, and the number required will depend on variables such as morphology and post thaw motility. Generally, we see a breeding unit of 3-5 straws.

Breeding units are where it gets extra tricky and there is no set standard.  The following is the recommended protocol for any imported semen.

  • A complete sperm count is done on the collection, and both morphology and post thaw motility being accessed when determining how to package the breeding unit.
  • We request a copy of the completed semenalysis prior to the importation to help with recommendations on how much semen to have sent over.
  • Regardless of the breed, we would like to see a minimum of 150 million live, normal, motile sperm cells, with the POST THAW MOTILITY included in the calculations. The preferred number is 200 million, but in smaller breeds, or when there is only a small amount of semen available, we can work with 150 million live, motile sperm per breeding unit.
  • We require the same number of live motile sperm per breeding unit, regardless of if the semen will be implanted via Transcervical insemination, or surgical implant.

When doing Transcervical insemination, optimum protocol is to do two inseminations, one breeding unit per insemination. With this in mind, we ask for a minimum of 2 breeding units, regardless of the method used to freeze the semen, whenever possible.  Due to the cost involved, it is worth having a discussion between the stud owner and purchasing bitch owner about sending an extra unit or two, in case the bitch does not take on the first breeding attempt.

  • If doing Surgical insemination, one breeding unit is used for the insemination. In many cases, a second breeding unit will be used for a follow up transcervical insemination.
  • If the semen is needing to be registered with the American Kennel Club, please note that we will need a small amount of semen to send in for DNA, if a swab is not included with the shipment, or if the stud dog is deceased. The DNA process requires 1 straw or 3 pellets to complete the DNA profile, so please send additional semen for the DNA testing.

Occasionally stud owners will send additional semen to us for storage in case of a missed breeding attempt.  We ask the stud and bitch owners to work out who’s account it will be stored under and who will continue with payments on the storage account going forward.

We hope this information is helpful when negotiating how much semen you will be purchasing. If everyone works with the same numbers and information, it increases chances for successful breeding and also keeps expectations uniform for all involved.

Please do not hesitate to ask us if you have any questions. We can be reached at export@siriuscaninefertility.com

Bridgett and Arabelle

Sirius Canine Fertility, Export Department

Filed Under: Uncategorized

Choosing A Protein Source for Your Dog’s Diet

November 21, 2016 By Bridgett Higginbotham Leave a Comment

by Linda Montgomery DVM

Whether you prepare your dog’s food yourself or purchase a commercial raw or kibble diet, your choice of a protein source is very important. Considerations include whether the meat is organically raised or not, any allergy issues your dog might have and whether it is meat or meat “meal”. Another, less commonly considered, aspect of choosing a meat source for your dog, is choosing one based on his or her constitution and/or current TCVM (Traditional Chinese Veterinary Medicine) pattern.

The focus of today’s newsletter is feeding according to your dog’s TCVM pattern. While many dogs are in balance, patterns of imbalance are present in most disease conditions. Keeping your dog in balance is important in preventing and helping treat common disease conditions such as arthritis and skin problems.

Dogs who are Yang deficient or bothered by cold, damp weather benefit from warm meats. Examples of warm protein sources include chicken, pheasant, beef kidney, chicken liver.

For dogs who are Yin deficient or bothered by heat, cool protein sources should be used. These include duck, rabbit, turkey and white fish.

Dogs who are Qi deficient are generally weak and can have a Yin or Yang deficiency in addition to a Qi deficiency. Qi tonic foods include beef, chicken and rabbit.

Blood deficiency is not the same as being anemic. Blood deficient dogs have dry skin, and brittle hair and nails. Beef, liver and heart are all blood tonic meats.

For dogs who are in balance, neutral foods are recommended to help keep them that way. Neutral protein sources include beef, beef liver, eggs, pork and tripe.

Some protein sources are very hot or very cold, and should only be used for short amounts of time or avoided completely. Lamb, venison and trout are hot, whereas crab and clam are cold. This is important because many commercial dog foods are lamb based and should be not be fed long term.

Commercial kibbles are highly processed and impart heat, which can be a problem for dogs with Yin deficiency or other heat related conditions. Home cooked diets or commercial raw diets such as Honest Kitchen are preferred over kibble for most dogs.

Filed Under: Nutrition for your Breeding Dog

Your hormones and your dog

June 11, 2015 By Bridgett Higginbotham Leave a Comment

How Your Hormone Replacement Therapy Can Affect Your Breeding Animals
By Linda Montgomery DVM, PhD
Many women over 40 are on hormone replacement therapy. Sometimes doctors prescribe oral hormones, sometimes sublingual hormones, and sometimes topical, or transdermal, hormones. The only one you need to worry about with your breeding animals are the transdermal hormones.
Transdermal hormone preparations are made specifically to penetrate the skin and elevate blood levels of hormones. These hormone preparations are very good at penetrating skin: not just yours, but any skin they come in contact with. That means your family members and your animals are all at risk for absorbing these hormones, which can cause adverse effects.
Women usually rub their transdermal hormone preparations in with their hands. Therefore the hormones are not only on the body part you rubbed them into but also on your hands. In addition, they rub off on any clothing, towel, or sheet you come into contact with. If you then touch your dog, or your clothing or sheets touch your dog, your hormones can then absorb through your dog’s skin.
Most female hormone preparations contain estrogen. If a breeding animal, whether dog or bitch, comes into contact with this estrogen, adverse effects can occur. Dogs can experience a decline in sperm count, and bitches can experience difficulty coming into season or maintaining pregnancy.
If you and your doctor determine that transdermal hormones are the only and best way for you to receive your hormone therapy, there are things you can to do protect your family and your dogs. After you apply your hormone cream, wash your hands and dry them with a paper towel, not a bath towel. That way if any residual hormones are left on your hands they are not deposited on a community towel. Also, put clothing on to cover the area where you applied your hormones. That way they are less likely to be spread to others. If you sleep with family members or your dogs, remember that hormones also transfer to sheets, so wear clothing to sleep in to keep the hormones from rubbing off on the sheets.
If at all possible, the best solution is to use oral or sublingual hormone preparations. This greatly minimizes the risk to the rest of your family or your dogs. Also, don’t stop using your hormones just to protect your dogs. Clients have done this and it can have an adverse effect on your own health. Always follow your doctor’s instructions, and discuss these concerns with him or her to find the best solution for your health and for the health of your family members and breeding animals.

Filed Under: Caution with your breeding dog

The 5 elements. What type is YOUR dog?

May 31, 2015 By Bridgett Higginbotham Leave a Comment

Diet Recommendations Based on TCVM Personality Type
Traditional Chinese Veterinary Medicine (TCVM) uses a system of classification called the 5 elements. The 5 elements apply to personality, disease predisposition patterns, and dietary considerations. This article will help you understand the primary elemental personality type of you dog, and feed accordingly.
The 5 elements are: Wood, Fire, Earth, Metal and Water.

WOOD TYPE
Personal Characteristics:
Dominant behavior or attitude
Quick, fast movements
Enjoys or skilled with running or moving
Impatient
Easily becomes angry or loses temper
Alert and responds quickly to stimuli
Good at adapting to changing conditions
Quickly forms ideas then changes mind
Narrow minded or intolerant to different ideas
Physical Characteristics:
Thin body, either tall or short
Big eyes
Performance is good but variable
Tendons are strong and healthy
Runs like the wind. Quick and nimble movement
Disease Predispositions:
Stroke
Allergy
Depression
Neurosis
TCVM Health Recommendations:
Wood types have limited tolerance for depression. Even a small amount of stress or depression will strain the Liver (the organ of the Wood element) function. Thus, foods that have harmonizing or regulating properties are very important to Liver function. The recommended foods include chicken liver, pork liver, green vegetables (mustard greens, spinach, cabbage), carrots and citrus fruits.

FIRE TYPE
Personal Characteristics:
Easily excited

[Read more…]

Filed Under: Nutrition for your Breeding Dog

Optimizing Semen Quality in the Dog

April 28, 2015 By Bridgett Higginbotham 2 Comments

May 2015

Optimizing Semen Quality in the Dog

by Linda Montgomery DVM, PhD

Semen quality is a constant concern for dog owners.  Your dog may have achieved show or performance goals, at which time it is appropriate to collect and freeze his semen for future litters of champions.  Unfortunately many factors can adversely affect semen quality in the dog, including age, infections, diet, medications, environmental factors, and unrelated health conditions.

Most dogs experience a decline in sperm production with age.  We many times get a 10 or 12 year old dog whose owner wants to have collected and frozen.  Sometimes they still have sufficient numbers of sperm for this purpose, and sometimes they do not. What we recommend to dog owners is to collect and freeze their dogs when they are young.  Although this is an extra inconvenience and expense, it ensures that your dog’s legacy will be preserved.

[Read more…]

Filed Under: Stud Dog Management

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Thank you for considering us for your canine semen import. We are frequently asked “how much semen should I ask for” or “what is a breeding unit”? These questions can be … Read More...

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