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[Aslan]

Newbie - I am unsure of the reason your snake may have gone off it's food, it seems likely it is husbandry related - could quite possibly be the heating/lighting regime...it may just be that he is sensing the change in season...

...however, on your feeding regime - a snake of the size you have described should comfortably be taking adult mice - and by the sounds of it, he is...if he has swallowed and digested them, they are fine...

...as to your comment that you have heard not to feed anything wider than the snake - this is incorrect - the feed should leave an obvious bulge in the snake...I think adult mice or similar sized rats will do this well...

...if you choose to feed multiple smaller items, do not give a few days break, just feed them one after the other on your scheduled feeding day/night. Once one is swallowed, offer the second...your snake should be eating roughly every 7 days, if he fails to take a feed do not offer a new one until the next scheduled feed...