On the facilities of Isla Nublar, the hatchling dinosaurs were delicate in the early days of their infancy. Ed Regis states that they had lost several to the Postnatal Stress Syndrome, which the scientists in the lab believed to be adrenocortically medicated with death following in five minutes. Alan Grant nearly caused a case of this in the Infant Velociraptor in the nursery after he picked it up, causing its heart rate to accelerate to the point where it was severely stressed out. The animal had stressed itself out from screaming due to Grant roughly examining it.
Jurassic Park by Michael Crichton page 110 (First Edition, Thirty Fourth printing)