While goats are generally hardy
animals, they are still susceptible to parasites and diseases. A
preventative disease program should be discussed with a
veterinarian knowledgeable in goat health related issues. Daily
observation of goats is an important aspect of the management
program. Warning signs of a sick goat may include:
-
Avoidance
of contact with other goats or owner
-
Distressed
facial expression, especially in the eyes
-
Appears
listless and dull
-
Reluctance
to move
-
Quick
shallow breathing
-
Coughing
-
Nasal
discharge
-
Teeth
grinding
-
Refusal to
eat
-
Frequent
urination
-
Change in
color and consistency of feces
-
Lower milk
production (lactating goats)
-
Abnormal
color and consistency of milk (lactating goats)
-
Fever
(above 103oF)
-
Changes in
behavior or habits.
Consult a veterinarian if any of
these signs are observed. Early detection of health-related
problems will increase the probability of successful treatment. To
help ensure healthy goats, purchase goats from a healthy herd.
Isolate newly purchased goats from the rest of the herd for at
least 30 days. If the goat has an infectious disease, it will
probably become evident within this time period.
External Parasites
External parasites
affecting goats include lice, ticks, horn flies, house flies,
stable flies, horse flies, deer flies, and mosquitoes. While it is
unrealistic to expect 100% fly control, good management can
prevent fly populations from becoming bothersome. Frequent pen/lot
cleaning and proper manure and bedding disposal are key factors in
fly population control. If goats are infected with lice, consult a
veterinarian for treatment.
Internal Parasites
Internal Parasites Internal parasites, particularly
Haemonchus ( Barberpoleworm ), are of great health and
economic concern to goat producers. In fact, internal parasites
are the major health threat to the U.S. goat industry. The best
method to effectively control Haemonchus and other worms
and minimize dewormer resistance is to selectively deworm (e.g.
only deworm those animals that are seriously infected). A system
of evaluation called FAMACHA has been developed to determine the
degree of Haemonchus infection in goats and sheep. FAMACHA
is a chart that correlates lower eyelid mucous membrane color to
degree of anemia. Haemonchus feeds on blood in the abomasum where
it resides. As Haemonchus levels increase each summer,
animals can lose enough blood to affect growth and health. The
FAMACHA chart consists of a scale of 1 to 5 to determine the
degree of anemia. Level 1 and 2 is excellent, 3 and 4 require
deworming, and 5 shows extreme infection and requires immediate
deworming to avoid risk of sudden death.
General worm control recommendations for pastured goats:
-
Keep stocking rates low and allow
vegetation to grow tall
-
Offer protein supplementation during
high risk periods
-
Rotate goats away form
worn-contaminated pasture or use pasture grazed by cattle
-
Cull poor doers
-
Use dewormers labeled for goats
whenever possible
-
Administer oral dewormers (use
drench gun) designed for goats/sheep
-
Deworm purchased goats with two
dewormers of different classes
-
Selectively deworm before going to
pasture
-
Monitor often using FAMACHA during
late spring and summer when risk is high and deworm selectively
as needed
-
Test for dewormer resistance every
two years
-
Deworm kids at weaning and consider
deworming does prior to kidding when administering CDT vaccine
Coccidiosis
Young kids are more
susceptible to coccidiosis, which is caused by an intestinal
protozoan. Diarrhea, which is often blood-tinged, dehydration,
weakness, and weight loss are characteristic of coccidiosis. Since
this disease is potentially fatal, preventative measures should be
part of the management program. Proper sanitation is essential
since the infective organism is transmitted via manure. Feed
additives are available for prevention and treatment of
coccidiosis.
Enterotoxemia
Clostridium
perfringens (types C
and D) bacteria normally present in the intestinal tract are
responsible for enterotoxemia or overeating disease, as it is
commonly known. Death is rapid and signs are seldom seen in kids.
Mature goats show depression and incoordination. Abrupt changes in
the feeding program or overfeeding will predispose goats to
enterotoxemia. Feeding changes enable the Clostridial
organisms to rapidly grow and release a powerful toxin, capable of
causing death in a few hours. All goats, especially show goats,
should be vaccinated for types C and D Clostridium perfringens.
Consult a veterinarian for suggested vaccination schedule. Due to
the management/nutrition induced predisposition of enterotoxemia,
feed changes should be made gradually over a period of 7-10 days.
Also See
Gastro-Intestinal Parasite Survival Kit
Tetanus
Goats are very susceptible to tetanus. Tetanus is caused by a
gram-positive bacillus Clostridium tetani that produces a
neurotoxin. Clostridium tetani spores enter through wounds
following castration, kidding, ear tagging, disbudding, etc.
Clinical signs of the disease can appear within 4 to 21 days of
initial infection. Symptoms include erect ears, elevated tail,
extended neck, rocking horse stance, rigidity, difficulty in
opening mouth, and a prolapsed third eyelid. The infection is
deadly, and producers often find young goats dead with heads
extended. The best protection against tetanus is a regular
vaccination program such as VISION CD-T, which is a combination of
Clostridium perfringens C&D and Tetanus toxoid.
Does should be vaccinated 2-6 weeks prior to anticipated kidding
date. Kids should have an initial dose at 30 days of age and a
booster at 60 days of age
or at weaning. Bucks should have an annual booster. Horses
routinely pass the tetanus organism in their droppings. This means
that goat producers with horses may be at greater risk and should
definitely have a tetanus vaccination program for their goats.
Urinary Calculi
The formation of
calculi (stones) in the urinary tract of male goats, especially
wethers, is the result of an imbalance of calcium and phosphorus
in the ration. Young males should not be castrated prior to 30
days of age. The first sign of this metabolic disease is a
goat’s inability to urinate. Restlessness, kicking at the belly,
stretching, and attempts to urinate are characteristic signs of
urinary calculi. Calculi may form when wether goats are fed
rations high in phosphorus, which contain an imbalanced calcium to
phosphorus ratio. Diets which provide large amounts of grains
(grains contain more phosphorus than calcium) may predispose goats
to urinary calculi unless the diet has been fortified to provide a
2:1 calcium to phosphorus ratio. Use of ammonium chloride in the
feed has been shown to lessen the likelihood of urinary calculi. A source of clean,
fresh water should also be available at all times. Encourage goats
to drink water. Providing a free-choice mineral supplement and
salt will facilitate water intake.
Soremouth
Contagious Ecthyma
(EC), commonly known as soremouth, is caused by a very hardy virus
from the pox family. It is highly contagious and can be
transmitted to humans. The disease progresses from water-filled
blisters to pustules and finally brown scabs on the lips and in
the mouth. Lesions may also occur on the udder and between the
toes. If the lesions do not become infected, the disease runs its
course in one-four weeks. Mature goats typically only suffer mild
loss of condition due to unwillingness to consume feed due to
sores in the mouth. Kids are more susceptible to dire effects of
this disease. They may refuse to nurse due to mouth sores and may
become lame from foot lesions. Infected animals should be kept
clean and in a clean environment to help prevent lesions from
becoming infected. Some owners rub iodine into the lesions after
scabs fall off. This helps dry the lesion and reduces infections.
A vaccine is available. Check with a veterinarian regarding usage.
Foot Rot
Foot rot can be
prevented by keeping the goat’s pen and pasture relatively dry.
Drain and fill in wet, muddy areas. The obvious sign of foot rot
is lameness. A grayish, cheesy discharge with a foul odor is
typical. Intense pain can occur. The rotten hoof area should be
trimmed and the foot treated with a 10-30% copper sulfate solution
or other treatment prescribed by a veterinarian.
Bloat
The accumulation of
excessive amounts of gas in the rumen (bloat) is generally caused
by overeating tender, young, high-moisture forages, particularly
legumes. Signs of bloat include restlessness evidenced by
frequently lying down and getting up, kicking at abdomen, and
making loud grunting noises. Call for veterinarian assistance
immediately as goats can die quickly. Prevention hinges on
ensuring goats are not hungry before turning them out to graze on
lush forage. Providing goats with a sufficient quantity of hay to
consume prior to turn out will help prevent bloat.
Pinkeye
Excessive eye watering,
reddened mucous membranes, and clouding of the pupil are
characteristic signs of pinkeye (infectious keratoconjunctivitis),
which is contagious. Stress, such as transporting, predisposes the
goat to pinkeye. Contributing factors include dry, dusty pens and
constant exposure to sunlight. Flies are known carriers of pinkeye.
Numerous broad-spectrum, antibiotic ophthalmic powders and
ointments are available for treatment. Consult a veterinarian
regarding the preferred products.
Ringworm
Ringworm, caused by the
fungi Trichophyton verrucosum in goats, is easily spread
from goat to goat, from infected equipment to goat, and from goat
to human. Skin lesions are circular in appearance and the skin
becomes dry and scaly. A preventative program is essential.
Disinfection of equipment and premises is highly suggested,
especially when showing goats.
Caseous Lymphadenitis
Corynebacterium
pseudotuberculosis (or
C. ovis) is the organism responsible for recurring
(chronic) lymph node abscesses (Caseous Lymphadenitis or CL, also
known as pseudotuberculosis). Abscesses can develop slowly, taking
months or years to develop and can be internal and external.
Infection enters the goat’s body through wounds caused by head
butting, punctures, or shearing. Although less likely, infection
can also occur via ingestion, inhalation, or penetration of intact
skin.
External abscesses are usually
found under the goat’s ears on the neck and head areas. Internal
abscesses are commonly found in the lungs, although they can occur
in the liver, kidneys, scrotum, and udder. Not all abscesses are
CL. Many abscesses are fast-growing nodules containing a
foul-smelling greenish pus caused by Actinomyces pyogenes.
An inexpensive blood test can determine the bacteria responsible
for abscess formation.
Currently, neither treatment
products nor a preventative vaccine is available. Goats with CL
should be isolated from the herd. An abscess should not be left to
burst on its own and contaminate the environment. Care is needed
in handling CL infected goats as humans can contract the disease.
Contact a veterinarian regarding proper procedure for lancing CL
abscesses.
Mastitis
An udder infection
(mastitis) in lactating goats may be chronic or acute. It is
evidenced by a hot, swollen, hard udder that is painful. The milk
may contain abnormal secretions, such as clots, stringiness, or
traces of blood. Antibiotics are used to treat mastitis. Proper
milking practices, stringent sanitation, avoidance of injury to
the udder and teats, and use of clean, dry bedding are crucial to
mastitis prevention.
Ketosis
Ketosis is a metabolic
disease, which can occur immediately prior to giving birth or
shortly thereafter. Proper feed management prevents ketosis.
During the last two weeks of pregnancy, the amount of feed fed
should gradually be increased. Avoid sudden ration changes. Loss
of appetite and little interest in kids after birth are typical
signs. An unusual odor to the breath, urine, and milk may also be
detected. Veterinarian intervention will be required for does with
ketosis.
Milk Fever
A drop in blood calcium
is the cause of milk fever. It usually occurs prior to kidding or
shortly thereafter and occurs more often in high producing does.
Affected does are typically found lying down and unable to get up
(partial paralysis). Veterinary care is needed if this occurs.
Prevention can be accomplished through dietary manipulation.
During the last month of pregnancy, ensure the ration does not
contain high amounts of calcium. Keep calcium content of the diet
low by feeding good-quality grass hay rather than legume hay and
using a low calcium mineral supplement.
Polioencephalomalacia
Polioencephalomalacia (PEM)
is a thiamin-responsive disease caused by “factors” which impair
thiamin synthesis or destroy thiamin, a B vitamin. Thiamin is
involved in carbohydrate metabolism. Primary factors contributing
to occurrence of PEM include high-grain diets, incidence of
acidosis, and feeds or water containing exceptionally high sulfur
levels. Corn by-products contain high levels of sulfur. Signs of
PEM, a non-infectious, neurological disease, include dullness,
excitability, head pressing, aimless wandering impaired vision,
and muscular incoordination. Treatment involves injecting affected
animals with thiamin solution.
Caprine
Arthritis Encephalitis
This retroviral (virus
that produces disease after long incubation period and infection
persists throughout animal’s life span) infection of goats causes
chronic joint disease. Two forms of caprine arthritis encephalitis
(CAE) have been identified – arthritic and nervous. The arthritic
form is clinically evidenced at one-two years of age with varying
severity. Some goats may show intermittent lameness or stiffness
for several years without becoming totally debilitated. Lameness
is usually seen first, followed by joint swelling, most often in
the front knees. As arthritis progresses the animal looses body
condition.
The nervous form of CAE usually
appears between one-four months of age. Kids have weak hind legs
eventually leading to paralysis. Some older goats may exhibit the
nervous form. Signs in adult goats include circling, head tilt,
and facial nerve paralysis.
Since not all goats infected with
CAE show signs, a serology test can be conducted to test for viral
antibodies. A positive serology test indicates the goat is a
potential shedder of the virus, primarily during lactation.
The virus is spread primarily to
kids via colostrum/milk from infected does. Mature goat
transmission other than through colostrum/milk is rare. Disease
transmission can be prevented by separation of kids from
CAE-positive does at birth and artificial rearing. Colostrum from
CAE-negative does should be given to kids. The virus can be
inactivated by heating colostrum/milk to 133-138oF and
holding at this temperature for one hour. To prevent CAE from
entering a herd, all herd additions should be verified CAE-free.
Ensure goats have access to clean,
fresh water and forage at all times. Goat Power Mineral should be
offered free-choice at all times. Goat Power products contain
copper. Do not feed to sheep or other copper sensitive species.
Angora and Pygmy goats have been reported to be sensitive to
copper supplementation.