Mammary pheromone-induced odour learning influences sucking behaviour and milk intake in the newborn rabbit
Excerpt: “…several results showed that pups could learn different odorants during successive days of conditioning, and that the more recently acquired cue was the most influential on milk intake.”
My comment: The classically conditioned response appears to occur in all mammals. It links food odors and pheromones to RNA-mediated gene duplication and RNA-mediated amino acid substitutions that differentiate all cell types in all individuals of all species from microbes to human throughout their life history transitions.
One RNA-mediated amino acid substitution may link all experiences from birth to puberty to adult behavior.
See for example:
Oppositional COMT Val158Met effects on resting state functional connectivity in adolescents and adults
Unfortunately, most theorists report the nutrient-dependent Val158Met amino acid substitution in the context of mutations and natural selection linked to behavior. They prefer to link mutations to behavior without evidence of the pathway that is required because they do not want to learn anything about biologically-based cause and effect linked to cell type differentiation. RNA-mediated cell type differentiation is an evolutionary theory killer.