OK - I wasn't sure if I should be feeding the rodents every day (like just one) or just feed 3-4 in one go (like the snakes). I think Tiny is almost 2 ft. He eats medium size mice - convenient because it's the size my hoggy eats and if she doesn't want her mouse (very rare) I just chuck Tiny an extra one
Tiny loves baths - I force him to walk up the stairs (I'm sure he needs the exercise

) then put him in the tub (when hubby is out the way or he complains he might scratch the bath) he'll put his head right under and swim a bit too.
Good luck with your roaches - I'm on the look-out for some - they seem scarce in the UK