I was talking to a guy at work about his pet rats and he said that he'd heard somewhere that rats have a 20 minute "Fear Memory" timescale.
I gather this means that if they're nervous, eg, when being held, they have a time of around 20 mins before they will realise that nothing bad has happened, and will start to relax, and not be afraid.
Has anyone else heard of this before? Any evidence to support it?
With this in mind, I'm trying to get my new girly degus to trust me more (slowly, slowly), and wondered if this kind of theory would apply with them as they hate being handled and picked up.