I used to feed my snakes outside of their vivariums, but I got lazy. So instead of putting them in a bucket and throwing a mouse in, I started putting the mouse into their vivariums, and tapping on the glass (real fast like a drum roll). They'd come out to see what the racket's all about, and they find the mouse and eat it.
In time, my snakes would associate my tapping on the glass like it's a dinner bell. So any other way, they'd know it's not feeding time, like when I stick my hand inside to pick them up.
In time, my snakes would associate my tapping on the glass like it's a dinner bell. So any other way, they'd know it's not feeding time, like when I stick my hand inside to pick them up.