Although each flock was visited close to slaughter when gait is known to be poorest, within the survey as a whole we were able to evaluate the effect of age on locomotion problems throughout the growth period because of the wide range of age at slaughter.
One unwanted side effect of this genetic gain has been an increased incidence of locomotion problems (termed "leg weakness") [ 5].
The first of these birds of prey had dyspnea and neurologic signs; the second showed asthenia and locomotion problems.
According to PigCHAMP™ 2007 annual report, the average culling rate of breeding females have been 48.65%, and 20~25% of that was caused primarily by locomotion problems.
In very large herds however, cows with locomotion problems are more difficult to spot and the herdsmen may also be more likely to cull lame cows.
These problems are seen in all dimensions of health and include among others emotional or intellectual functioning, but also locomotion, problems with sexuality, burden on caregivers [ 1, 18, 20, 26, 32].
Among professional trainers, horses' locomotion problems at high speed is an important clinical finding anecdotally suggested to be caused by OUC, but there are no studies including high speed work or other performance data available.
Data on the prevalence of welfare issues in domestic ducks are scarce [ 17, 18] but given that, in duck and chicken breeding, selection intensities and achieved growth rates and carcass weights are similar, it is likely that locomotion problems also exist to some extent in the domestic duck.
To move to the desk for this boy with serious locomotion system problems means his mother must carry him, with the help of the form-master and his classmates.
