If it is some sort of injury, I’d use a smaller F/T prey item so that the snake doesn’t have to open up as wide. Otherwise, she may be made nervous by your presence. As long as its F/T, as soon as she takes it I’d walk away with the lights off and let her do her thing. Remember a snakes way of defending herself is to bite if they need to, and sitting there trying to swallow a rat can take them a while. Thats many minutes that she won’t have her main defense useful, and this may make her nervous with a large possible predator in the room
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