In-Depth Reproduction Information
Natural Breeding of Dogs
Natural breeding is classified as physically breeding the bitch with the stud dog via introduction(s), bitch reception and
Proestrus is considered the first day that any signs of the heat (estrus) are noted, such as vulvar swelling or vulvar discharge. Record this day on your calendar. Five days after the onset of proestrus (Day 6), introduce the bitch to the stud to see if she will stand for him (be receptive to him). For territorial reasons, always take the bitch to the stud. The
If using progesterone test kits to maximize timing, start testing on Day 5 of proestrus. Test every other day until progesterone reaches 5 ng/ml. Breed the dogs 48-72 hours later. For most test kits, 5ng/ml is indicated by the high end of the color range.
If a Cesarean section (C-section) delivery is a possibility, vaginal cytology can be done daily to help safely time the C-section. Slides can be made at
An abdominal ultrasound to confirm the pregnancy can be done
Dystocia is identified as the bitch going for more than 3 hours without producing a pup,
It is recommended that all breeding dogs be tested annually for brucellosis. Stud dogs that breed frequently should be tested twice yearly. Vaginal cultures on bitches are not
Management of the Pregnant Bitch
An initial pre-breeding visit involves a complete physical examination of the bitch, with
An abdominal ultrasound is usually performed about Day 28-30, after the last breeding to diagnose whether the bitch is pregnant. Plain
In obese bitches, weight reduction, before breeding improves conception rates and decreases the risks of poor lactation and dystocia. Weight loss is never attempted during pregnancy. During the first 3 weeks of pregnancy, the well-conditioned bitch may experience little weight gain. Consumption of a high-quality, adult food is sufficient for the first 2/3 of the pregnancy.
Overfeeding during the first 2/3 of pregnancy is a common tendency. Bitches that become pregnant and are excessively thin should eat a growth or performance diet to correct their low body condition.
Around week 3 of gestation, many bitches experience appetite loss that may persist for several days to a week. Mild gastrointestinal (GI) upset and nausea may also occur. Appetite typically returns to normal about Week 4.
Feeding multiple small meals is sometimes better, especially if the litter size is large. Many, but not all, bitches stop eating 24-48 hours before delivery. During
Administration of supplemental vitamins and minerals to bitches is discouraged. Few supplements are a pure source of a given nutrient. Calcium supplementation is actually contraindicated. Cottage cheese is not recommended. Increased calcium requirements are usually met by increased food consumption of a well-balanced diet. Excessive calcium intake, above that, provided by a
Excess Vitamin A has been associated with congenital defects in the offspring, including cleft palate. Folate deficiencies have been associated with fetal defects in humans. Most premium diets provide adequate folate, but supplementation of B vitamins is not considered harmful. Dogs produce enough Vitamin C from their diet and do not require supplementation. Excess Vitamin D intake can affect calcium metabolism of the bitch and is not recommended.
Supplementation of omega-3 fatty acids maximizes cerebral and retinal development in the fetus, and may even help produce larger litters with fewer stillbirths. The ideal ratio is 5:1 omega-6 to omega-3. The veterinary product, 3V Caps, provides this ratio. Most bitches should receive a fatty acid supplement.
In bitches that do not eat voluntarily, dietary supplementation is needed. In severe cases, termination of pregnancy may be needed to avoid life-threatening hypoglycemia (low blood sugar) or pregnancy toxemia. Bitches that do not receive enough carbohydrates are also more prone to pregnancy toxemia. Pregnancy toxemia causes a significant increase in stillborn puppies and neonatal death, within the first 3 days of life.
Regular exercise is important during pregnancy, to maintain good body condition. Brisk, short walks and short episodes of swimming are the safest forms of exercise. In late gestation, bitches with large litters require shorter walks. Advanced obedience and agility work are not recommended during pregnancy. Significant mental or physical stress should also be avoided.
Routine vaccinations should be completed before breeding. The puppy’s immune system is dependent upon high levels of antibodies passed to them in the bitch’s colostrum (the
Infection of developing fetuses by Toxocara
External parasites are best controlled by environmental management and approved topical formulas, such as Revolution or Frontline. Use of organophosphates and pyrethroids should be avoided. Heartworms do cross the placenta and pregnant bitches should be maintained on preventive agents, such as Interceptor, Sentinel, Revolution or Heartgard.
Although uncommon, some bitches do not produce progesterone levels high enough to maintain pregnancy. The progesterone level must not drop below 2 ng/ml. If the bitch has a history of losing a pregnancy or prior infertility, the progesterone level may be checked daily if it is discovered to be less than 5 ng/ml. Low progesterone levels can be treated with daily injections of progesterone in oil (2-3 mg/kg), intramuscularly (IM) or maintained with daily, oral ally-trenbolone (Regumate) at 0.88 mg/kg. Progesterone supplementation is discontinued within 72 hours of the timed whelping date.
Administration of any medication, during pregnancy, should be avoided unless absolutely necessary. Check with your veterinarian before administering any products, supplements or medications to the bitch.
Ovulation Timing in Dogs
Ovulation timing is important when artificial insemination (AI) techniques are used because shipped, frozen or chilled semen have decreased survival times. Survival time is only a few days for cooled semen and as low as 12 hours for frozen semen, in contrast to fresh semen that can live for 5-11 days. Several techniques are employed to maximize conception rates and litter
Day 1 of proestrus is considered the first day that any signs of heat (estrus) are noted, such as vulvar swelling or vulvar discharge. Record this day on your calendar. Five days after the onset of proestrus (Day 6), progesterone testing is started. Progesterone testing requires sending a blood sample to a referral laboratory for evaluation. The bedside progesterone tests are not accurate enough to use reliably for artificial insemination. Progesterone samples are submitted every other day until ovulation occurs, which is usually at a progesterone level of 5 ng/ml.
Depending upon the laboratory, results are available within a few to 24 hours. Once ovulation has occurred, insemination is planned for 3 days later. This delay allows time for shipment of frozen or chilled semen. If a second breeding is planned, it is done 48 hours after the first breeding. A progesterone sample is taken at the time of breeding to ensure levels are between 15-25 ng/ml. This range maximizes litter size and conception rates.
Vaginal cytology is combined with progesterone testing to determine when diestrus has occurred. Slides can be made at
Vaginoscopy (examination with a viewing scope) can be used to evaluate changes within the vaginal vault that occur with proestrus and estrus. Vaginoscopy is typically recommended when transcervical AI is planned.
Artificial insemination can be achieved by several techniques. A common technique is
For chilled or frozen semen, transcervical or surgical insemination is recommended because these techniques deposit the semen directly into the uterus. Chilled and frozen semen do not live as long, so intrauterine deposition maximizes conception rates. Surgical insemination is best for bitches with previous infertility problems because the uterus can be visualized and any intrauterine cysts manually
Transcervical insemination (TCI) offers several advantages over surgical insemination. TCI can be done without sedation in most bitches, especially if the owner is present. The procedure takes 10-15 minutes. Insemination can be done multiple times within an estrous cycle, usually 48 hours apart. The technique involves the use of a rigid viewing scope to visualize the cervix. The scope enters the vaginal vault, similar to
Litter survival rates are higher with properly timed Cesarean sections (C-sections). C-sections are often done 57 days after the onset of diestrus. An abdominal radiograph (x-ray) is done, at Day 52, for a puppy count. An abdominal ultrasound, to confirm the pregnancy, can be done
If natural whelping is planned, the radiograph allows evaluation of the size of the puppies to estimate whether they will be able to pass through the pelvic canal. The radiograph is not harmful to the developing pups. Dystocia is identified as the bitch going for more than 3 hours without producing a pup,
Preparing for your dog's labor and puppy care can be both exciting and fun; still, awareness of potential problems is of paramount importance. It is a good idea to keep track of your dog's breeding date so as to know when to expect what.
After about 35 days of pregnancy, the mother's caloric requirements will begin to increase. In general, she should require about twice as much food as usual; whereas, when she begins nursing, she will need three times as much food. The best nutritional plan is to buy a dog food approved for growth (i.e. puppy food) and feed according to the package; such diets are balanced and require no supplementation, plus they typically have the extra calories needed by the pregnant or nursing mother.
Sometime around the 45th day, your dog should be examined by a veterinarian. At this time, the skeletons of the unborn pups will have mineralized, and are, thus, visible on a radiograph. Your dog's abdomen should be x-rayed so that you know how many pups to expect. Ultrasound may be used to confirm pregnancy much earlier (after 25 days, the embryonic heart may be seen beating), but it is more difficult to count the number of pups using this method. A general pregnancy blood test can be performed around day 35 just to confirm whether or not she is pregnant, but neither this nor ultrasound will tell you how many puppies to expect; only radiographs can do that.
A comfortable area should be set aside for whelping and raising the puppies. The bitch should feel at home here and should be able to come and go as she likes, while the puppies must remain confined.
It is important that the mother dog
A dog’s gestation period is considered to be 63 days, though this is not written in stone; a normal range might be 58 to 68 days.
When your dog's due date is approaching, you should begin monitoring her rectal temperature. When her temperature drops below 100° F (normal canine temperature is 101-102° F), labor may be expected within 24 hours.
The First Stage of Labor
During this stage, uterine contractions begin. The bitch will appear restless and may pace, dig, shiver, pant or even vomit. This is all normal, and all an owner can do is see that she has water available should she want it. This stage of labor is long, lasting 6 to 12 hours, and culminates with
The Second and Third Stages of Labor
The second stage is the hard labor stage, in which the puppy is expelled. The third stage refers to the expulsion of the placenta and afterbirth. Each pup may not be followed by afterbirth; the mother may pass two pups and then two placentas. This is normal.
Puppies are born covered in membranes that must be cleaned away or the pup will suffocate. The mother will bite and lick the membranes away. Allow her a minute or two after birth to do this; if she does not do it, then you must clean the pup for her. Simply, remove the slippery covering and rub the puppy with a clean towel. The umbilical cord may be tied in a knot about one inch from the pup and cut with scissors on the far side of the knot. Be careful not to pull on the umbilical cord as this can injure the puppy. The mother may want to eat the placenta, but this is probably not a good idea as vomiting it up later is common; it is best to clean away the placenta yourself.
Expect some puppies (probably half of them) to be born tail first. This is not abnormal for dogs.
CALL YOUR VETERINARIAN IF:
- 30-60 minutes of strong contractions occur with no puppy being produced.
- More than 4 hours pass between pups and you know there are more inside.
- She fails to go into labor within 24 hours of her temperature drop.
- She is obviously in extreme pain.
- Greater than 70 days of gestation have passed.
It is normal for the bitch to spike a fever in the 24 to 48 hours following birth. This fever should not be accompanied by clinical signs of illness.
Normal vaginal discharge after parturition should be odorless and may be green, dark red-brown or bloody and may persist in small amounts for up to 8 weeks.
Problems to Watch for...
Metritis (Inflammation of the Uterus)
Signs of this condition are as follows:
- foul-smelling vaginal discharge
- loss of appetite
- no interest in the puppies
- decreased milk production
If these signs are noted, usually in the first day or two postpartum, a veterinarian should be consulted. Your dog may have retained a placenta or have suffered some trauma during delivery. Animals who required assistance with delivery are often predisposed to metritis. She will likely need to be spayed.
This condition results when the bitch has trouble supporting the calcium demand of lactation. Calcium supplementation predisposes a bitch to this condition.
- nervousness and restlessness
- no interest in the pups
- stiff, painful gait
- This progresses to:
- muscle spasms
- inability to stand
This condition generally occurs in the first three weeks of lactation and a veterinarian should be consulted immediately.
Mastitis (Inflammation of the Breasts)
Normal nursing glands are soft and enlarged. Diseased glands are red, hard, and painful. In general, the bitch does not act sick; the disease is confined to the mammary tissue. The bitch may be sore and discourage the pups from nursing; however, it is important to keep the pups nursing the affected glands. This is not harmful to the puppies and it helps flush out the infected material. Hot packing may be helpful.
Most dogs are excellent mothers and problems are few. The basic rule is to seek veterinary care if she seems to feel sick or if she ceases to care for her young. Puppies nurse until they are about 6 weeks old, and then, may be fully separated from their mother. A good age for adoption to a new home is 8 weeks or later.