I know you are just exaggerating numbers but even with two normals you are already at 1%. I have 3 spiders. One of which is a train wreck and one that used to be (symptoms can return at any time though). I used to avoid these guys but after acquiring one by accident (long story), I have found that actually make really good pets. All three of the animals are thriving and are being bred this season. As Deborah said we all have our line of what we will breed and what we will not. I will not go spider to spider and I will not breed anything that has known kinking issues.