Hatchling Weight and Feeding Records: Weekly Weigh-Ins, Refused Meals, and Growth Rates

A hatchling that is not growing is a hatchling that is not healthy. Weekly weight records and feeding logs give you an objective picture of each animal's progress and flag problems before they become serious. For breeders selling animals, these records also reassure buyers and support premium pricing.

Weekly Weigh-Ins

Weigh every hatchling on the same day each week and record the weight in grams using a digital kitchen scale accurate to 0.1 grams. Ball python hatchlings typically weigh 60 to 100 grams at birth. A healthy animal should gain 5 to 15 grams per week in the first few months when feeding consistently on appropriately sized prey.

Track weight over time in a per-animal log rather than just the most recent weight. A hatchling that weighed 65g at hatch, 70g at week 1, 78g at week 2, and 85g at week 3 is growing well. One that weighed 65g at hatch and is still at 68g at week 4 needs investigation regardless of whether it is eating.

Feeding Logs

Record every feeding attempt with the date, prey item offered (species, size, weight if available), whether the animal struck or refused, and the method (live versus frozen/thawed). Over time this creates a pattern that tells you each animal's preferences and feeding reliability.

Note the prey size in relation to the snake's girth. A prey item roughly the same width as the widest part of the snake is appropriate. Too small and the snake may refuse or not gain weight efficiently. Too large increases regurgitation risk.

Refused Meals

Ball python hatchlings can be stubborn feeders, and a refused meal is not automatically a crisis. But two consecutive refusals warrant investigation. Three or more warrant a vet consult if other symptoms are present.

Document refused meals consistently. When a hatchling that has been eating reliably for six weeks suddenly refuses twice in a row, check its weight trend, check for signs of upcoming shed, check enclosure temperatures and humidity, and examine for stuck shed or other physical issues. The feeding log makes this retrospective analysis possible.

Common reasons for refused meals include: approaching shed cycle, temperatures too low or too high, prey size change, stress from handling or enclosure changes, and underlying health issues. Good records let you eliminate causes systematically.

Growth Rate Analysis

Calculate growth rate as percent of body weight gained per week. A 70-gram hatchling that gains 7 grams in a week has a 10% growth rate. Track this metric over the first 12 to 16 weeks of life for each animal. Hatchlings consistently in the bottom quartile of your cohort by growth rate are candidates for supplemental feeding protocols or veterinary evaluation.

Growth rate records are also useful when evaluating breeding projects. If animals from a particular pairing consistently grow faster or slower than others in your collection on the same feeding schedule, that is worth noting as a genetic observation. Body conformation and growth rate are heritable traits.