Highlights
We studied 122 mass-at-age data for goats, sheep, and wildlife.
We used Bertalanffy-Pütter models to obtain better fitting growth curves.
The Brody model had an acceptable fit to 70% of the data.
For 39% of data the best-fitting BP-model had a discernable inflection-point.
For these models, maximal weight gain per day was 55% higher than natal weight gain.