I have a few beaded's that are nearly a year old & one is kinda of calm but the other is pretty mean . Seems liked they switched places as days go on . They will not try & bite my tongs , wood or anything that I put near their faces but my hand or finger's they will bite . I'm not sure but I believe they know the difference , very smart & nosy . My beaded's are sloowww & Lazy . Only to move to drink , eat , & to " explore briefly " .