I have a male betta for about 8 months now. Last weekend, my sister left the windows open and the temperature in the tank got down to about 65 degrees. He’s warmed back up now, but now he’s spitting out all ( or at least most ) of his food. I htought that maybe he was still too cold, so have bought a tank w/ a heater and he is in there. The transfer went ok and he seems to be enjoying the new habitat, but something is still obviously amiss as he still is spitting everything out. He was originally eating pellets, but I’ve tried both live brine shrimp and frozen brine shrimp with the same results. It is possible that he did swallow one or two brine shrimp, but this is a far cry from his previous appetite. Does anyone have any idea what his problem could be? His coloration is fine, and his entire demeanor seems unchanged, other than his appetite is gone. Its been over a week like this and I am very concerned. Please help.