ANSC 210 1st Edition Lecture 16Outline of Previous Lecture I. Belgian MalinoisII. What are they trained to do?III. Selecting a DogIV. Patrol CarsOutline of Current LectureI. Doga. Breeding Cyclesb. Vaginal Cytologyc. Breeding BitchesII. Catsa. Cat CyclesCurrent LectureI. Doga. Breeding Cyclesi. Monoestrus breeder1. Only come into heat once or twice a year ii. Canine cycle stages:1. Anestrus a. When the dog is not in heatb. No ovarian activity c. No estrogen and no progesterone activity 2. Proestrusa. Some dogs bleed blood during this timeb. This is when you see signs of estrusc. Some do not spot at all and some bitches will spot2. Estrusa. Secreting pheromones which will attract intact malesb. Actively seeking out male dogsc. Breeders usually breed halfway through the 9-day estrus cycle2. Diestrusa. Occurs for 60 days no matter whatThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.b. Progesterone will be high in either pregnant or non-pregnant dogsb. Vaginal Cytologyi. One way to determine what reproductive stage the bitch is in ii. Take a vaginal swap and roll it into a slideiii. The slide is then stainediv. Estrus cells will be dead and will not have a nucleusv. The cell membranes will be thinb. Breeding Bitchesi. Ways to determine when to breed:1. Count the days from the start of proestrust (the start of bleeding)a. Breed ten to fourteen days after the onset2. Breed at first standing heata. Breed when the bitch will allow the dog to mountb. Breed two and four days after2. Progesterone testinga. Breed when progesterone is 18 nm/lb. Breed two to three days later2. Vaginal cytologya. Take the dog to the vet and they will vaginally swap herb. Breed when 80% of the cells are anuculear c. Breed two to three days laterii. Bring the bitch to the dog1. The dog is more comfortable and the dog needs to performii. Bitch will play with the dogiii. The males mount from behind and the dog will step over the hindquarters posteriorly iv. The males and bitch will be combined for thirty to forty minutesv. Mounting and intromission occur followed by engorgement of the bulbis glands1. The initial penetration; the dog only ejaculates a small portion of highly concentrated sperm2. The second penetration; the dog is tied, the dog ejaculates a lot of sperm.b. Diagnosisi. Palpationii. Ultrasoundiii. Radiographs 1. Skeletons calcify about day 452. You can then see each pup ii. Relaxin1. Blood sample2. If the blood sample is positive for relaxin at about twenty days, the bitch is pregnantb. Gestationi. You can determine when the bitch will give birth by taking rectal temperature every day ii. The temperature is usually 100 - 100.5 iii. If it drops o 99 - 98 the bitch will give birth at 8 - 12 hoursiv. The dog will also start nestingv. The dog might stop eating vi. Will pantvii. Delivery1. The bitch or a human needs to remove the amniotic sac and stimulate breathing2. The puppies need to eat within one hour to get the colostrum3. The puppies need to defecate meconium within one houra. Black tar poopb. If you do not get them to defecate this, they will become constipatedII. Catsa. Cat Cyclesi. Polyestrus breedersii. Cycles:1. Anestrus2. Proestrus3. Estrus4. Postestrus (no ovulation)5. Diestrus (if ovulated)ii. Ccats are induced ovulatorsiii. The queen must have copuation in order to
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