help!

okay so as some of you know...i have recently token on 4 leapord gekos.... Just in case you guys dont know....my incle used to have them ans he didnt feed them for like almost a year and when i saw they were still alive i got them food and fed them..well, my 2 females Buffy and Aqua keep throwing it up...buffy seems to be less active a WHOLE LOT and she seems like shes about to die...i really need help....