Will an underfed snake have stunted growth?

I picked up a few snakes last weekend which had been receiving questionable care for some time. In particular, I saw the feeding card for this Spider, which dates back to 18 months ago when it must have been a baby. In the beginning they were feeding it consistently, every few days (maybe even two much (power feeding?), appears to be sometimes 2 adult mice on 3-5 day intervals), then becoming more normal after that, until about January of this year (10 months ago), when the keeper changed to a guy admittedly too busy. For the last 10 months, it was fed on average once a month -- in one case it was over 2 months between (possibly they forgot to write it down that time). Although, at least recently I think he's been feeding it small rats which is at least a decent meal.

So this Spider (supposedly female), which I estimate to be 1.5 YO weighs 342g (empty). When I first saw it it looked a bit underweight but not too bad. But when I got those numbers, 340 grams after 18 months seems extremely small to me. I would think a ball should be that big after 9-12 months with proper feeding? Am I right?

And if so, could this prolonged underfeeding stunt the snakes growth, or will it catch up after some number of months to where it would normally be?

http://images.craigslist.org/00F0F_l...Bo_600x450.jpg

http://images.craigslist.org/00000_1...OU_600x450.jpg

Also see if you can tell what's wrong with this picture (from his ad):

http://images.craigslist.org/00w0w_f...A8_600x450.jpg

Could growth be stunted? Anything is possible.
Do you know if food was offered and not eaten or not offered at all?
QT.....

It will catch up with a normal feeding regimine.

The probe is just hanging free, and not measuring any heat pad temps?

340 grams is pretty darn low judging on my own records, which have my 3 snakes around that age between 500 and 700. I'm sure with proper feeding she'll catch up, but I wouldn't expect it to happen very quickly. I would think it would just take her a little longer to reach adult size than it would normally take, but I don't think her current size/age ratio will be any indicator on her overall adult size. Her spine does look a little too visible to me, but I wouldn't call her emaciated judging on your pictures.

Thanks guys, that sounds positive overall.

I do not know if she had refused food at times. But he said she eats F/T and sure enough, she pretty quickly hit the small F/T rat I gave her yesterday so doesn't currently have an eating problem.

Daigga - you are correct, in identifying the "hanging probe" for +300. :) May explain the melted through plastic on some of the tubs. Regarding this rack setup which I bought, I have more questions but will ask those separately.