This time of the year for adults it's not unusual, but since you don't have any history on those animals being from a company that just resell animals it's hard to define what is normal for them as well, hence why buying from a reputable breeder that knows his animals is so important as they can give you pointers.
I can tell you that my carpets unless breeding (females after ovy) NEVER turned down a meal, this is the one species you can usually always count on when it come to food, again not having any background on the animal it can be normal for them or not.