Right now, climate change. This planet was a paradise and we ruined it for ourselves. I don’t think we have very long before ecosystems just start breaking down in massive ways.

Hmmm my friend had a cat that was presenting as asthma and wasn’t responding to treatment. Turns out the apt she was renting had mold in the walls and she had to emergency move. I don’t want to freak you out, but also consider environmental factors as well. Best of luck to you are your kitty!