Can other pets stress out my Ball Python?

[redshepherd]

Well, why I ask is because she is really only as small as a large rat but with long legs. He eats medium ones with ease. I don't really know how they can tell if something is food or not and how far they can see. Maybe she looks smaller from where he sees her. Not that he would get to her but maybe it could make him antsy because he thinks I'm about to feed him. She doesn't live here but is here maybe once every couple of months for a few days.

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If it makes you feel better, ball pythons are picky and tend to fixate on a certain type of food. I promise that your ball python doesn't see your maltese as food haha.
Also, your maltese is actually 8x larger than the size of a large rat. Large rats only weigh up to half a pound lol. Even x-x-large rats (fed to giants) weigh ~1 lb.