I wanted to give an update before I try again tomorrow.
Monty shed successfully and finished yesterday with a complete perfect shed. I didn't notice anything last Sunday when I tried to feed but maybe because he was beginning the process might also be why he refused. He is a BEL so I didn't notice until Monday when I saw a slight haze in his blue eyes. I made sure he has some extra moisture in his warm hide and a few days later he fully shed. So, crossing fingers, but I'm trying again tomorrow to feed him and did get some Mouse litter from a pet store to maybe give the rat some mouse scent before I feed. I'll let you know how it goes. Thanks for all the great advice!