That doesn't make much sense to me, I got them as a juvenile in the store last November. Their first molt since then was about two and a half weeks ago, and they've eaten 5 dubia roachs and a cricket since then. The water bowl is consistently filled as well.
The first photo, is the day back from the store, where they were kept in a live feeder box with just substrate a month up until I brought them. If you're referring to that photo, then it was more than likely the stores fault, I've looked after them attentively since then.
It's fine, you're not to know.
If it is a MM, I'll be fairly peeved with the store owners who sold it to me for £40 as an unsexed juvenile. I won't be too happy for my first tarantula to live around a year with luck.
look up "palpal bulbs" or "emboli" and if you see the same bulbous shape at the tip of its pedipalps the next time you get a chance to look, then you will know. a female or immature male will have pedipalps that p
taper at the end nearly identicle to any of the legs