We had a cockerel go down with limber neck (botulism) a couple of weeks ago. No idea why, clean coop, feed and water and no access to rotting vegetation, insects, etc. He was less than a year old and had been entirely healthy up to that point so I decided to stop him getting dehydrated and give his body a chance to deal with the toxins. We held him and extended his neck three times a day while I dropped warm water over the back of his tongue with a pipette. We also took him in the house for warmth as there was 35cm of snow down at the time. After a couple of days he started to struggle, then to stand and is now eating, drinking and crowing although his head is still tilted slightly to one side. If he survives I may try breeding from him, for he must have the constitution of an ox.