I found if you leave the tub open about a half inch the rat will be interested in getting out and a bit distracted while my BP sneaks up behind
Also @ BoostedMX3 iv been stuck with a rat for about 1-2 months when my BP went off feed, they grow FAST so be careful might outgrow your snake, also pick up a $5 ball bearing rat water feeder, TRUST ME I tried the shotglass it does not work!! they tip it over, stick things in it etc, its nearly impossible to get the rat to drink out of anything else, even if its just one it will save you from ripping your hair out.