Percs stopped eating

[Bartman]

Hi All,

I've got two Percs, one for 4 years, one for 1 year, that host in a large colt in my tank. Normally they come out and eat anything I put in but about 6 weeks ago they stopped. They basically stay in the colt and ignore any type of food I put in. Could they be guarding eggs or something? They don't look sick and haven't starved yet. They are only a little slimmer than normal so they must be eating something but I never see them out of the colt anymore. There have been several water changes over this period and everything else in the tank seems happy. Any thoughts as to what may cause this?

Thanks,
Scott.