It is so sad. But it's also natural and just because they don't live as long as humans or other pets, doesn't make their life less valuable (you could say to your mum maybe). Especially in your care, their life will be full of joy and worth the world! The fact you are upset shows how caring you are. It's more an argument for why you should get another little one
As I've heard a lot on this forum.. they leave little pawprints on our heart, no matter how little the paw they make a deep print
I love that expression! Glad you've decided to look after another hamham x