AlpacaKeepThe first few weeks after unpacking are the highest-stakes period of camelid farming. A breeder's most immediate anxiety is whether the newborn cria is thriving or slowly failing. Visual assessments are often useless; a fluffy fleece can easily hide a dangerously emaciated skeletal frame. While evaluating adult body condition is done by palpation (using the Alpaca Body Condition Score Calculator), survival of the growing cria requires a digital scale and strict adherence to a biological growth curve.
Here are the definitive mathematical benchmarks for healthy alpaca and llama growth during the critical first 60 days, and the exact thresholds where you must intervene.
1. The Birth Weight Baseline
A cria's birth weight is the single most accurate predictor of its survival.
- Alpacas: The healthy baseline is 7 to 11 kg. Crias born under about 6 kg are at higher risk of mortality and require immediate, intensive monitoring.
- Llamas: The healthy baseline is 9 to 15 kg.
2. The First 24 Hours: The Normal Drop
Do not panic if your cria loses a slight amount of weight on day two. It is biologically normal for a neonate to register a slight weight drop during the first 24 hours as they pass meconium (which should typically occur in less than 18 hours) and expend massive amounts of energy before the maternal milk fully drops. Put a hard limit on it, though: the early drop should not exceed about 10% of birth weight, and the cria should be gaining again by Day 3. A loss past 10%, or no positive gain by Day 3, means the cria is not getting enough milk - intervene and weigh twice daily.
Your primary concern on Day 1 is passive transfer. The cria must consume 10% to 15% of its body weight in colostrum within the first 12 hours of life to absorb the necessary immunoglobulins (IgG).
3. The 60-Day Growth Curve (Average Daily Gain)
From Day 2 onward, the math becomes strictly linear. You must weigh the cria at the exact same time every day to calculate the Average Daily Gain (ADG).
- Alpaca ADG Target: Alpacas should gain an average of 100 to 250 grams per day.
- Llama ADG Target: Llamas should gain 250 to 500 grams per day.
With good nutrition, a healthy cria roughly doubles its birth weight by about one month of age.
4. The Intervention Triggers
Intervening too early with a bottle can destroy the maternal bond, but intervening too late results in a fading cria. You step in only when the data dictates it. You must intervene if you observe any of the following data triggers:
- The cria loses weight for two consecutive days past Day 2.
- The ADG flatlines (0g gained) for 48 hours.
- The ADG consistently stays below the absolute minimums over a 4-day rolling average.
5. The Emergency Bottle Feeding Protocol
If the dam's milk has failed, you must calculate supplemental feeding based strictly on body mass to avoid overfeeding, which can cause severe colic or diarrhea.
- Volume: Feed 10% to 15% of the cria's current body weight daily.
- Frequency: Divide this total volume into smaller, frequent feeds (e.g., every 2 to 4 hours for young crias).
- Execution: Never force-feed, and always feed with the cria's head in a natural nursing position - nose pointing slightly up, never lying flat or with the head pulled down. The reason is anatomical: when a cria sucks and swallows in the right posture, a reflex closes the esophageal (reticular) groove and channels milk straight to C3, the true stomach. Force-feeding, or feeding with the head held horizontal, makes that groove fail to close, so milk spills into C1, the large fermentation forestomach. There it ferments instead of digesting, causing "ruminal drinking" - lactic acidosis and bloat that can kill a weak cria fast. Milk pushed in too quickly can also be inhaled into the lungs. Let the cria suck and swallow at its own pace; if it has no suckle reflex, stop and call your vet rather than pouring milk in.
| Weight | Min daily (10%) | Max daily (15%) | Per feed |
|---|---|---|---|
| 7 kg | 700 ml | 1000 ml | 60–120 ml every 2–4 hrs |
| 9 kg | 900 ml | 1350 ml | 90–120 ml every 2–4 hrs |
| 11 kg | 1100 ml | 1700 ml | 90–150 ml every 2–4 hrs |
| 14 kg | 1400 ml | 2000 ml | 150–210 ml every 2–4 hrs |
6. Spring European Risks: Parasite Vigilance
For European breeders, the spring unpacking season aligns with severe parasite risks. As soil temperatures warm between April, May, and June, Nematodirus battus eggs undergo mass hatching events, causing profuse diarrhea and rapid weight loss in young grazing crias. Furthermore, farms experiencing high cria mortality rates often have a higher prevalence of the devastating coccidia Eimeria macusaniensis. A sudden, unexplained drop in your cria's ADG is often the very first warning sign of these internal infections before physical symptoms appear.
That is exactly why we are building AlpacaKeep - an upcoming algorithmic early-warning system that tracks these exact metrics automatically.
While we finalize the platform, you don't have to keep guessing with the data. Join the AlpacaKeep Early Access Waiting List today and get immediate, free access to our ADG & Intervention Tracking Spreadsheet. Start securing your herd data now and be the first to gain access when the full software launches.
Sources & Further Reading
- Bravo, P. W., Garnica, J., & Puma, G. (2009). Cria alpaca body weight and perinatal survival in relation to age of the dam. Animal Reproduction Science.
- Tamburini, A., et al. (2023). Body measures, growth curves and body weight prevision of alpacas (Vicugna pacos) reared in Italy. Italian Journal of Animal Science.
- Merck Veterinary Manual. Herd Health of Llamas and Alpacas & Parameters for Newborn Camelids.
- UK Alpaca Vet. Feeding Guide for Crias: Milk Volume and Frequency.
- SCOPS / Teagasc. (2026). Nematodirus battus Hatching Forecast for European Spring Risk.
- University of Guelph Animal Health Laboratory / Cebra et al. Eimeria macusaniensis Intestinal Coccidiosis in Alpacas.