Hey, had my axolotl a couple of months now, and it's been fine and pretty sociable. It'd happily swim to the glass for a nose when I was near by, and often swim to the surface when I opened the top of the tank. However, for the last few days (up to a week) it's hardly come from out of his cave, and has seemed very timid and scared, moving to the back of the tank when i go near the glass. I was cleaning the tank at the weekend and it almost jumped out of the tank altogether when it got close to the gravel cleaner I use to siphon the water. I've seen it sit on it in the past, with no concern what so ever. It's looking healthy, and will still feed by hand (if i can get him out of hiding), just seems a little out of character. I'd been feeding it solely on frozen bloodworm until last week, however there are a few bits of gravel in with the sand (that i'm slowly picking out by hand) so I started to give him beef liver last week until I can get all the gravel out as it is easier to feed without him taking the odd piece of gravel. This is the only change in its routine that I can think of. Just thought I'd ask, any words of advice will be greatly appreciated.