Worried about our little runt.

[JodanOrNoDan]

Also, is it normal for a snake who isn't eating to still strike and constrict the prey? Could this mean there is something wrong with the size or freshness,etc? The rat last night actually split at the abdomen after he squeezed it a while but I never saw him try to swallow it. I did leave it for a bit with the tank covered but he just left it.

This tends to happen when you thaw the prey too quickly. I have a couple pigs that will eat anything but most of mine will not touch something that has burst when they are constricting it. As to your original question you have gotten some good suggestions. I am leaning to dropping back down a prey size and then offering more frequently if the animal will take it. If this happens and it is still not gaining weight, a fecal is definitely in order.