I have read about Martin Heisenberg (Würzburg) who is researching fruit flies. His experiments have taken place in the 60s. He experimented with heat and electricity.
We are very obliged to the poor rat which always is subject to stress experiments:
Parameters of hormetic stress and resilience to trauma in rats. Plumb TN, Cullen PK, Minor TR. Stress. 2014 Dec 29:1-8.
Differential stress response in rats subjected to chronic mild stress is accompanied by changes in CRH-family gene expression at the pituitary level. Kolasa M, Faron-Górecka A, Kuśmider M, Szafran-Pilch K, Solich J, Zurawek D, Gruca P, Papp M, Dziedzicka-Wasylewska M. Peptides. 2014 Nov;61:98-106.
Inoculation stress hypothesis of environmental enrichment. Crofton EJ, Zhang Y, Green TA. Neurosci Biobehav Rev. 2014 Nov 29;49C:19-31.
Environmental enrichment and cafeteria diet attenuate the response to chronic variable stress in rats. Zeeni N, Bassil M, Fromentin G, Chaumontet C, Darcel N, Tome D, Daher CF. Physiol Behav. 2015 Feb;139:41-9.