On July 23rd, (so a little over a week ago) I purchased a beautiful bright blue male Betta from Petsmart. His name is Gillbert, and I don't know how old he is. Anyways, I've been very careful with him; he is in a gallon fish bowl. I de-chlorinate his water using drops that I bought from the store and he has a sprig of bamboo in his tank, which seems to clear the water really well. I feed him every other day, and he gets one or two fish pellets and two or three freeze dried bloodworms. Last night, he couldn't eat. If he happened to swim near enough to touch a pellet or worm, he'd nip at it but it seemed like he couldn't see the food at all. He wasn't responding when I touched my finger to the glass or to his reflection in a mirror held up to the glass. Fearing the worst, I was afraid that he was blind. This morning, I changed his water and while in his little cup, he ate food. He is responding to my touch on the glass now. The only problem is that he's not showing an aggression to his reflection. He follows it if I move the mirror, but eventually gets bored and swims away. I tried the reflection test a few days ago because I wanted to see him flare, so I know he responds. I'm just slightly weirded out and want to know what could cause this sudden loss of aggression, and if it is bad or nothing to worry about.