Hmmm....
A couple questions before I can really conclude what the problem is:
1. What are the temps in their cages?
2. Have you tried leaving thawed (and still warm) mice in their cages on a rock?
3. Have they been showing any signs of sickness? Such as "stargazing", difficulty breathing, wet nose, or messy stools?
Unfortunately I don't know a whole lot about copperheads feeding habits... is it possible that they fast similar to ball pythons?
Don't know if that helps...
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Sean McIntyre
Currently have:
0.1 Antherystic Elaphe Guttata Guttata - Corn Snake
1.0 Elaphe Vulpina Gloydi - Eastern Fox Snake
0.1 Leucistic Elaphe Obsoleta Linheimeri - Texas Ratsnake
1.1 Morelia Spilota Cheyni - Jungle Carpet Python
Saving for:
Agkistrodon Contortix Mokasen - Northern Copperhead
Epicrates Cenchria Cenchria - Brazilian Rainbow Boa