My older ferret is three yeas old now and has a very weak heart. I have to be prepared that he can die any day, though usually ferrets live 6-7 years.

A ferret! Lovely creatures, you can roll 'em into a ball! :)

But as you say, even the toughest animals can have a poor constitution.

I'm really impressed by your attitude.

Thanks. That means a lot. :)