I just got a second breeding group yesterday, they are in the same rack as my 'established' group, one of them seems like it might be sick, sneezing a little bit, I had this happen with my first breeding group and all but one died, and I fed off the last. My question is is there something I can do short of taking them all to a vet? Maybe putting something in the water or something? Any suggestions would be great, thank you!