Evaluation of the Stud Dog Flashcards
What is the first problem you see with 2 animals bred together that are too closely blood related (i.e. brother/sister, son/mom, etc.)?
Fertility - decreases the closer you get
What age is peak fertility in dogs?
2-4 years of age
What age is peak freezability of dogs?
2-5 years of age
T/F: Toy breed dogs may have peak fertility earlier than 24 months of age, whereas giant breed dogs may not have peak fertility until later.
T
What is the gold standard screening test for Brucella canis?
Cornell mutliplex test
Should you perform a physical exam before or after semen collection?
After
Why do overweight dogs have poor fertility?
Dogs put fat in their scrotum -> adds heat -> sperm don’t like to be hot -> poor fertility
Which of the following endocrine abnormalities affects fertility?
A. Hypothyroidism
B. Cushing’s
C. Addison’s
D. A & B only
E. B & C only
F. All of the above
E, Cushing’s & Addison’s
How long is the spermatogenic cycle?
60 days
T/F: If you give a stud dog antibiotics, it will only affect his fertility for the next 30 days.
F, it will affect his fertility for the next 60 days because spermatogenesis lasts 60 days.
T/F: It is safe to use Bravecto in breeding animals.
F!!!!! Decreases fertility & causes birth defects
What internal & external structures should be evaluated in all male dogs when present for a reproductive examination?
- Penis & prepuce
- Testicles, epididymes, spermatic cord, scrotum
- Prostate gland
What is smegma & should you be concerned if a male dog presents with this?
Preputial discharge containing a mixture of WBCs & debris;
This occurs in intact & non-intact males & it is normal.
Why should you let a dog urinate & defecate outside prior to attempted collection?
Colon sits right on top - if they have not defecated yet, then it might be uncomfortable for them to give you a sample (& they may not even give you one because of it)
When collecting semen, why should you avoid lubrication containing chlorhexidine (i.e. KY lube)?
Because chlorhexidine is toxic to sperm cells
Describe how to perform a manual ejaculation for semen collection in a male dog.
- Grasp penile body behind the bulbus glandis
- Apply strong constant pressure (NOT friction) to create a tourniquette effect.
- Apply pulsatile pressure to bulbus glandis
Pulsations should begin with or without thrusting from him
For penile blood flow, the blood will flow into the ________ ___________ and the ___________ from the female keeps that blood in during natural breedings.
Corpus spongiosum, occlusion
What is in the first fraction of ejaculate?
Some prostatic fluid +/- urine (this is the presperm fraction)
What are the 3 fractions of ejaculate?
- Presperm fraction
- Sperm-rich fraction
- Prostatic fraction
What is in the second fraction of ejaculate?
Sperm-rich semen; comes from epididymes & testis
What is in the third fraction of ejaculate?
Prostatic fluid only; this is the post-sperm fraction
What is a non-invasive way of evaluating the prostatic fluid when you suspect disease?
Semen collection. Collect the first 2 fractions, remove the bag, and when the 3rd fraction begins, grab a red top tube.
Describe the color of each of the ejaculate fractions.
Presperm = slightly cloudy
Sperm-rich = grayish white
Postsperm = crystal clear
Do you need to keep the third fraction from the ejaculate?
No, unless you need to evaluate the prostate
