Less than one-third of the dietary nitrogen should be provided as urea in order to minimise ammonia toxicity. Signs of ammonia toxicity include bloat, twitching, ataxia, excessive salivation and death. | Less than one-third of the dietary nitrogen should be provided as urea in order to minimise ammonia toxicity. Signs of ammonia toxicity include bloat, twitching, ataxia, excessive salivation and death. |