Eating and the after effect

[Waltorian]

Well I was really happy that Reggy(my BP) ate his first mouse in my possession..now here is the ???he ate on friday the 4th..today while I was at work he pooped out 2 yes 2 shriveled really smelly mice carcases(I mean really stinky like dead smell) there was also a little green crystally looking thing over in the corner of his tank..I waited about seven days to feed him from when I got him and they said he ate a few days before that..he is about 9 mo old....I just dont know what to expect. is one poopy supposed to stink up the whole house??I appreciate any help..Waltor