Flashcards in small fluffy ruminants Deck (40):
ram= 6 months ewe= 5-7months
buck=3 months, doe=5-7 (pygmy 2-3)
estrous sheep baaaaaa
17 days, 24-36 hrs baaaaa
21 days (12-36hrs)
ovulation sheep baaaa
24-30hrs from onset
30-36hrs from onset
optimal breeding time sheep baaaaaaa
end of estrus
optimal breeding time goat
acceptance of buck and 12 hrs after (Twice)
breeding based on body weight. 60-70% total BW. goal is 3 pregnancies in 2 years (twins better)
small rums short day breeders. september-january.
syncing the breeding
p4, ram effect, melatonin on pineal gland, lights. to get into cycle, start with mimicing diestrus phase. p4 mimics CL function, starts the diestrus mimic phase. CIDR or soaked sponge with p4.
sheep breeding sync
cidr removed 12-14 days after insertion and injected with eCG. AI 55 hrs later. another option is to breed 50 hrs later, and again 10hrs after that
goat breeding sync
pgf2a and eCG given 9 days after CIDR insertion, removed day 11. AI 44 hrs later. or breed 30 hrs after and again 18 hrs after.
functions to stimulate follicle stimulation and ovulation
ecg v. p4
to induce estrus- eCG. but if syncing, pgf used and no need for eCG because follicle already developing
progestagen vaginal devices. dont use with ram effect and melatonin because doesnt make sync.
advances breeding season by 4 weeks
Progestagen/progesterone impregnated vaginal devices
mimics corpus luteum function
eCG (PMSG) injection is optional
cervical rings. ewe tortuous, doe aligned.
sheep need to be together for 27 days. goats for 32 days
different amounts of sperm. vaginal the most, laparascpoic the least. 400 mil, cervial 200 mil lap 20 mil
indirect pregnancy diagnostics
no return to estrus or low p4 levels. doe is CL dependent, ewe has a luteo placental shift at 50 days
transrectal at 17-60 days. trasnabdominal at 26 days to term. can detect cotyledons after 30 days. most accurate and commonly used dx tool. difficult to count feti after 90 days. radioogy best after 90 days can count feti 50 days after AI. ballottement after 100 days
bioPRYN preg B specific protein >30 days, estrone sulfate, >50d, placental lactogene >60d`
ewe gestation length
148 days and CL dependent until 55-6d. then placenta. induce parturition by glucocorticoids- mimics natural effects of parturition. pgf2a wont be effective because of placental progestagens
doe gestation length
150 days and CL dependent whole time. induce parutrition by glucocorticoids of pgf2a. combination of both injections most effective
major cause of infertility in rams. ascending infections bacterial. less immune function in younger aimals. brucella in rams. dx by palpation and seeing WBC in semen/urine. cull. put abx in feed for lambs. reportable
pizzle rot.. sheep common. predisposed if castrated, high protein diet, high urea level, cornyebacterium. skin irritation, ulceration, necrosis. keep area clean, abx. low protein diet. remain sterile but with testosterone.
false pregnancy of goats
large amount of uterine fluid with a CL. hydrometra, mucumetra, cloudburst. persistent CL on ovary. no cyclic activity. bioPRYN test neg cuz no pregnancy. give pgf2a to kill CL and oxytocin to expel fluid.
negative energy balance from multiple feti present in pregnancy. decrease glucose utilization in brain (CNS signs). fat as energy source. Primary: unable to metabolize
o Triplets, quadruplets, etc o Too thin or too fat
• Secondary: condition that reduces intake of nutrients
o Lameness o “Broken Mouth." ketonuria, acidosis, dehydration, liver failure. good feeding management and IV glucose. give steroids to speed maturation and then c section
prepartum/late gestation. high estrogen. cull. retention device ewe saver, harness, buhner suture with umbilical tape or prolapse pin.
common late gestation, heavily lactating. give calcium borogluconate
cervix fails to dilate. leads to dystocia- c section, cull. hereditary
dystocia. wait 30 minutes, check doe and provide assisted delivery after 30 minutes, wait 30 minutes for net kid. meconium is bad.
lateral flexion of head with carpal flexion of forelimb. posterior is okay. pull down at 45 degrees to follow natural path of birth canal. retained membrane at 12-18 hours. give pgf2a.
post partum. normally not recur.
toxoplasma, enzootic, vibriosis, q fever, listeria, brucella, lepto, slamonella, neospora canis, blue tonue, border disease, cache valley disease, endotoxins
cat contamination feces. no abortion if infected prior to breeding. white necrotic foci on cotyledon. no changes in intercotyledonary space.
Enzootic abortion of ewes
chlamydophila abortus. reportable. thickening or necrosis of cotyledon, intercotyledonary space. will not have white foci. aborted feti have congested livers with white necrotic feci. subq petecchiae. latent carries shed during estrus. ram can trasmit. cull. vx good
campylobacter. MOST COMMON CAUSE ABORTION SHEEP. rare in goats. fetal stomach contents. nectrotic liver lesion. abx. ewe become immune. vx good.