I've noticed lately that both of my adult, non-elderly cats tend to snore when sleeping. Usually they're sleeping on their sides or curled up when this happens. (I don't notice it in "meatloaf" position, and they don't sleep on their backs.) They don't appear to be in any distress, and we've just been to the vet for a routine exam and gotten a clean bill of health. Is snoring normal? Are there particular factors that affect it, like diet or environment?
We did get told that they're both a bit overweight and we'll be taking measures to deal with that. But we're not talking Garfield-class cats here; they should each lose a pound or so. (They're both 13-pound regular domestic housecats, no identifiable breed.)