I have a lesser male who ate once 3 weeks ago...and 1 time a month or so before that.....Ive had him since december 27th (weight when recieved 659grams)....he gained weight and last weighed in at 669grams (1 week ago)....after fluctuating between 700 and 655 grams since ive had him (some of the weights were measured a few days to a week or so after eating). He now weights in at 660 grams....anything to be concerned about?

Thanks

oh and he is eating small live rats...when he does eat lol....the breeder had been feeding live or pre-killed (with varying alterations between the 2)