its too young for mareks to manifest. Birds become paralysed in one or both legs or the wings and lie down. They will eat normally but there may be considerable weight loss. Few birds die.
Newcastle is a possibility but you would normally have more birds infected. When we got hit by ncd over a year ago I lost 60% of birds that weren''t vaccinated. Chickens often have turned heads when suffering from NCD. They also walk in circles or may have difficulty in walking. Other frequent signs are green diarrhoea, difficulty in breathing, depression and ruffled feathers. Birds usually die.
dietary causes of paralysis
A lack of vitamin E causes crazy chick disease. This occurs in chickens 2 to 3 weeks of age. Typical signs are muscular weakness: frequent falling, head and neck pulled towards the back, paralysis and eventual death because of starvation.
A lack of vitamin B2 (riboflavin) causes curled toe paralysis. This occurs in 10 to 14 day old chicks. A lack of this vitamin affects the nerves of the wings and legs. Typical signs are reduced growth rate: legs are stretched out, curling-in of toes, drooping head, wings and tail feathers. Birds are still alert. The paralysis leads to death as a result of starvation. In early cases giving vitamin B2 in water leads to a rapid recovery.
Coryza will make the eyes swell but again - normally you see it at 12+ weeks and there is no paralysis
not sure what the heck it is
only other cause of paralysis I know of is botulism
This botulism toxin is usually present in dead and rotting poultry and other carcasses. It can also be present in maggots or beetles that have fed on these carcasses. Chickens get sick when they peck at these carcasses, maggots or beetles, or drink water or eat feed contaminated by carcasses. Chickens are weak and unable to walk, which eventually leads to paralysis. The head may be twisted or hang down. They may also lose feathers around the neck region.
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