When assessing the premature clinical condition of the bird, attention was drawn
to its behavior, the response to external stimuli, mobility, activity, feed and water
intake, body and head position, feathers (especially around the cloaca), skin color, form
and size of the cockscomb, presence of excreta from natural openings, pigmentation of
the beak and skin of the feet, the nature of the feces, the frequency and the type of
respiration, the presence of wheezing, the state of the legs and joints.
The pre-slaughter examination of broiler chickens from control and experimental
groups conducted by us indicates that chickens were actively moving, adequately
responding to external stimuli, actively taking food and water. The position of the body
and the head was natural in a state of rest and during the movement, the feather cover
was clean, dry, adhered to the body; visible mucous membranes were of a pale pink
color, the beak was dry, the cockscomb was of a pale pink color, the limbs surface was
dry, with no damage and swelling; breathing – without wheezing, body temperature
ranged from 41 up to 42 ºС.
It should be noted that they did not detect any gastrointestinal disturbances in
experimental groups of a poultry after the use of antibiotics, since tylozine did not
affect the motility of the digestive processes. Therefore, the feces of chickens in the
control and experimental groups was moderately thick.
During the study, the cases of disease or deaths of broiler chickens were not
observed. Before the slaughter, the bird was kept untreated for 12 hours. At the end of
the antibiotics use, the slaughter (6 broiler chickens per one time) in each group was
carried out after 3 h and in 5−8 days (withdrawal period), respectively, after the last
pharmazin and tilotsiklinvet usage.
The post-mortem evaluation of broiler chickens slaughter products included the
definition of the appearance and color of the carcasses, the appearance of muscles in
the cut, the establishment of consistency, the smell, transparency and aroma of the
broth.
During the veterinary and sanitary examination of broiler chickens’ carcasses,
attention was drawn to the condition of the beak, mucous membranes of the oral cavity,
eyeball, carcass surfaces, subcutaneous adipose tissue, serous membrane, sinuses and
joints, the presence of hoarseness, seals, injuries, hemorrhages, wounds, edema, and
contamination. During the beak examination, they determined the degree of its gloss,
humidity and elasticity. During the examination of the mucous membrane of the oral
cavity, the degree of shine, color, moisture, the presence of mucus and mold were
determined. After examining the state of the eyes and the shape of the eyeball, attention
was drawn to its convex shape. During the examination of the carcass surface, they
paid their attention to the condition of the skin and its dryness. When examining the
serous membrane of the lumbar cavity, its moisture, gloss and presence of mucus were
determined. After the incision of the chest cavity, a veterinary examination of the
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