Help........found new baby dragon dead this morning

[wacmac]

Hello
we have a 2 yr old male yellow morph dragon and a female sandifre dragon who we got 4 weeks ago and is about 5 months old. She was purchased at **** in toronto and when we got her she refused to eat any thing but crickets ..no greens no veggies........i talked to them about this and they said it is okay. today i woke up and she was in her cage dead. she was fine last night when we went to bed and today she had a swollen belly and mouth gapping open.......she was not running around alot lately and his in her own cage and has proper lights and heat lamps,,,,,,I was wondering if anyone knows why thins would have happened...because i wil be calling the place we got her this mornning to speek about getting another lizard as this was my daughters long sought after birthday gift and she is devistated right now.. any help or thoughts would be much appreciated
thanks