I was in the same situation as you. I feed two at a time to go through what I have stored in the freezer. I give one (the bigger of the two), then when that one is swallowed completely he put the second under the heat lamp to bring the temp back up some for a moment. Then I put the second one in there and he's taken it every time. He's got used that that now, so now when he swallows the first one he'll get back in the strike position and wait for the second. Sometimes he'll strike, coil, and "kill" the first one, then let go, and get back in the strike position and wait for the second before he even starts to swallow the first. When he does that I ALWAYS wait until he swallows the first one before I give him the second.