I've only just started a colony of ASF's but from what research I've done, it's important for the male to have enough room to be able to pursue the female(s) prior to breeding them. You mentioned 1.3 in a 10 gallon tank...is that all you have in there are your breeders or are there pups/weaners in there as well? Crowding might be an issue, as could temperature as glass tanks don't ventilate well and too many bodies in too small an area could be making it too hot. I keep mine at a range of 78 to 83 degress, as they're in the same room as my snakes and that's the ambient temps in there. So far mine have been doing great at those temps and are producing just fine. Any tumor growths noted on any of the breeders or anything unusual like that? The breeder I bought mine from said he feeds his raw organic kale greens a few times a week and the vitamin A helps to keep them healthy with no tumors whatsoever after he made that change. Do the females have a box or "den" area they can hide in to give birth? I don't know that they would be capable of electing to come into heat or not but it might be that environmental stress(es) are keeping them from cycling as they should if they don't have somewhere they feel comfortable giving birth. How old are all of your breeders? I rotate my Norways out ever 6-8 months or so as far as retiring breeders; some go a little longer but when their production drops off, they get retired. From what I've read and found talking with other keepers, a year or so is about the max for soft furs as well as far as females producing. Is it a high foot traffic area that might be stressing them out? Cat, dog, etc. bugging them? That's weird for them to just up and quit like that unless it's age or some outside stress that's caused them to cease production like that. Hope that helps and sorry can't say one way or the other what the issue is; good luck!
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