Alpacas are naturally herd animals and only really feel safe with their own kind. They must not be kept singly.
Generally, they are hardy, healthy animals and, as with all livestock, they must be checked once a day, preferably twice.
By spending time with your animals you will get to know them, this often makes it easier to detect when they are out of sorts. The earlier problems are detected and help administered, the greater the chance of a speedy recovery.
Alpacas usually give very little indication that they are feeling unwell until they are very sick. Early indications may include loss of appetite, spending more time lying around and not keeping up with the herd. Abnormal breathing and/or posture, lameness, discharge from eyes or nose and just generally looking depressed. Any unusual behaviour can usually be detected by a thorough check round.
If there is ever any doubt pertaining to the health and welfare of your animals, veterinary assistance should always be sought.