The veterinarians and staff at McKee-Pownall Equine Services provide reproductive services. We take great pride in continuously updating our skills to provide our clients with the most current and innovative techniques and equipment. Reproductive work can be scheduled on-farm.
Breeding soundness examination
Instruction on requirements for importation of semen
Infertility diagnostics (uterine culture/sensitivity, cytology, and endometrial biopsy)
Treatment of the infertile mare
Vaginal speculum examination and endoscopy
Hormone analysis and manipulation
Evaluation of pregnancy and strategies for maintenance of pregnancy
Pre-foaling preventative health care
Foaling assistance/Dystocia management
Post-foaling preventative health care
24-hour emergency service
Breeding Time line
Breeding soundness exam, synchronize estrus and monitor uterine structures and conditions
Deworm – All stages of encysted small strongyles
Vaccinate for Rabies (now or at month 5 of pregnancy)
Dental care (now or second trimester)
Monitor progesterone levels in at risk mares
Day 0 – Breeding date
Day 14-17 – Rectal ultrasound to confirm pregnancy and rule out twins
Day 25-29 – Rectal ultrasound to re-confirm viable pregnancy and rule out twins. Check fetal heartbeat.
Day 60-70 – Ultrasound fetal sexing
Day 60 – First deworming
-Maintain hoof care, feed for growing foal
Day 150 – Second deworming
Initiate Herpes vaccination (EHV-1)– Month 3, 5, 7 and 9
Open Caslisks at day 300 or later, rising plane of nutrition, monitor for signs of placentitis
Day 270-300 - 9 Months vaccination for EHV-1. Vaccinate for EWT, FR, WN, and PHF
Day 310 - Third deworming
Day 330-340 – Foaling
Reminder – like women, horses foal within a normal window and normal foals can be born anywhere from 300-360 days. Do not rely on a due date!
Rule of 3: Foal should be standing in 1 hour, nursing in 2 hours, mare should pass the placenta by 3 hours
Post Foaling Exam
Veterinary exam within 24 hours of foaling
Test for serum IgG concentration within the first 12-18 hours
Deworm mare 24-48 hours after foaling
Dip umbilical stump – 3-4x daily for 2-3 days
Monitor nursing, meconium passage, body condition and conformation
First week of life– mange flexural limb deformities, dip umbilicus and monitor temperature and overall health
2-4 weeksinitiate therapy for moderate to severe angular limb deformities (often working with farrier)
6-8 weeksof age: Deworm for roundworms (ascarids)
6-8 weeks later: Deworm again
4-6 months of age: Initiate vaccination series for WNV, EHV-1/4, EWT, Rabies. In epidemic areas, vaccinate for PHF and Strep equi
5-7 months of age: Booster vaccines
9-10 months of age: Booster EHV-1/4 and EWT. Vaccinate for influenza.
11-12 months of age: Deworm all stages of encysted small strongyles
Follow this link for more information on What do do when your mare is foaling?
Timeline For Artificial Insemination
The first step, once you have decided to breed your mare, is to select a stallion and contact the stallion owners. You should find out which days the stallion is collected, how the semen is shipped and time frame for shipping. In addition, for international shipping, you must find out what import regulations exist. This information can be obtained from our vet offices, CFIA office, or online on the CFIA website.
Next, your veterinarian needs to perform an initial assessment, including ultrasound examination, and other diagnostics depending on the mare's reproductive history. The initial ultrasound exam can provide information on when the mare is predicted to be in heat, and her potential timing of ovulation. Once the mare is in heat, she needs to be followed closely to predict the time of ovulation. For fresh chilled semen, the semen needs to be inseminated prior to the mare ovulating, and will generally remain viable within the uterus for up to 48 hours. For frozen semen, the mare needs to be inseminated within 4-6 hours after ovulation, and requires much more diligent monitoring of the mare through ultrasound. Once the mare is bred, medications are often administered to promote ovulation. Ovulation is confirmed after insemination, and the mare is checked 14-16 days after ovulation for pregnancy.