If you like lil furry mice and don't mind the smell, sure, go and breed em, they're cute lil things. But the smell can be overpowering if you have too many males around (I keep 2 males and rotate them so they don't get tired out). Also, they tend to produce way too many offspring for just one snake even with just a single female, and the female will get worn out real quick if you constantly breed it. I usually keep 4 females and 2 males around and breed them staggered, so one of them breeds the first week, the next week another female gets bred with the resting male, and then the third week, the first male gets bred to the 3rd female, and 4th to second male, and then all the mice rest for a month before going again, since by that time I have more than enough mice. I keep my mice healthy too, and they give me big litters, usually 10 or more, I even take them to the vet once in a while to get them free of parasites and such. Also I keep a few of the young ones alive for future breeding.
The females I keep together in the same tank, and they share the babysitting work between themselves, I only separate them when I introduce one of them to a male when I need to breed, and the males are solitary, and I play with them everyday so they don't get depressed.
You should kill the pinkie if you're not going to feed it right away. Pinkies need food like every 4 hours, and if you starve it for a day, it's kinda on the mean side. Just break their necks, they'll thank you for it.
-13mur 6