That is definitely not normal. Have you checked for back or neck injury? Or perhaps anemia that leaves her too tired to hold her head up? How long has she done this? Does she walk properly (not stumbling or ataxic)?
Hi Judith I brought the girl only a couple of weeks ago am not sure what is going on yet but she seems fine except for this hanging neck she doesn't stumble at all she is due to have a cria in a few weeks I will call the vet in if she shows no improvement soon
Do you have prior medical records, or have you asked the prior owner if she's always displayed this behavior? I'd certainly have your vet check her before she delivers. If she has an injury - neck or back especially - it could affect her ability to deliver without assistance.
If you are new to alpacas, it may be submissive behavior if she is also lowering her shoulders a tad and flipping her tail up... I sure hope that's all it is! Kate McKelvie Alpacas of Sunset Fields Glen Rock,PA