Re: Hamster chirping
It looks a bit unusual to me because he's wide at the back and then much narrower at the neck. When he sees the vet again, ask them to feel his abdomen carefully and listen to it with a stethoscope for any noises that would indicate a build up of fluid.
The greasiness could just be because he isn't using the sand bath (although that is unusual for a dwarf hamster).
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