All pets
PET
BRONTO EGG
Bronto
Cosmic
$1.5M/s
Wiki data synced Oct 24, 2026 · on the wiki since Sep 4, 2026
Base income
$1.5M/s
Found in
Prehistoric
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Drop chance
7%
Base size
35,000 kg
Steal reward
+300k Speed, $150m
Grow time
11m
STATS
About 1 in 14 eggs that spawn in Prehistoric is a Bronto.
10
eggs · 50% chance
32
eggs · 90% chance
Eggs you need to see to get at least one, from the wiki's spawn chances.
HATCH ODDS
Size
Normal
Golden
Rainbow
35,000 kg (base)
$1.5M/s
$3.75M/s
$5.25M/s
350,000 kg
$6.21M/s
$15.5M/s
$21.7M/s
3,500,000 kg
$25.7M/s
$64.2M/s
$89.8M/s
Same formula as the calculator. Golden ×2.5, Rainbow ×3.5; pets can carry more than one mutation.
INCOME BY SIZE
Also in Prehistoric
Dodo · Pterodactyl · Ankylosaurus · Triceratops · T-Rex · Tralaledon · Mosasaurus
RELATED PETS
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Bronto on the Steal An Egg Wiki
Community data from the Steal An Egg Wiki (CC BY-SA) · Updated Oct 24, 2026