Alternative Food For a Picky Corn Snake?

In my experience, with all of my babies, once they reach a year, they just...stop. My ball pythons and my corn all pulled this stunt when they turned 1 AND 2. She's not being picky. She's growing. She's almost being a "moody" teenager, LOL. Everything I've seen, read, and every person I've talked to have said this is relatively normal. My corn FINALLY started eating again after 5 months of turning one. One of my balls? SEVEN MONTHS. I thought the worst, made a vet appointment, but the week before he was due, he was out, curious, so I thought I'd try to feed and he slammed down two rats. Appointment canceled and he's been a good eater since. 

I'm also assuming that it's spring in your part of the world, and believe me, it's also very common for them to not eat at all, because she has a little somethin' else on her mind right now: she wants to mate. My girl didn't start pulling the "I'm not eating because I'm horny" schtick until she was about 3, and that was another scare. She wouldn't eat from end of March till end of June. Now it's just a normal phase we go through and we will give her a pinky/hopper RAT, full of fat, end of March so she has that at least until she's over it. She is now 12 years old, healthy and big as ever. Just fed her 2 days ago and I know it's her last meal for a while. 

So it's good she ate one, and keep trying (maybe after a shed would be best), but don't panic. She may not eat until June, like mine, she may eat the next time you try. It may take her a year to get on a normal feeding schedule, then she stops in November until March (not that it's not common, but *SOME* reptiles will still try and go into brumation, their own little way of hibernating, and not come out or eat during the winter months). She's not being picky, she's just off food right now. I have never seen any snake eat like clockwork every two week perfectly. They are still "wild" animals at heart and still follow their own schedules and ways of doing things. 

*IF YOU NOTICE ANY OF THESE THINGS, yes, there is a problem: Wheezing, labored breathing, losing weight (spine is very noticeable), and overall lethargy and dullness of scales (when it's not shed time) time for a vet, absolutely. But I think she's being a moody teen butthead scaring her human, LOL. 

Grounded dog meat 

Make Sure the temps are right in the cage and she’s got lots of hiding places. If she is stressed out she won’t eat  

Idk much about reptiles. But ik Goherping on YT, maybe try to contact him or watch his videos. Also I'd reccomend any Reddits that deal with reptiles or snakes.