3rd Way Is Best.
by Sharon
(Maine )
Over the past 40 years or so we've have three cats who were inside at night/ free to roam with open cat door available during the day. (All were neutered of course).
The first lived 18 years and died of kidney failure.
We got the next two as 8 week old kittens. The female lived to be 19, the male 22. They died of natural causes. They were all healthy, with no weight problems. They preferred to do their business outside, except in the middle of blizzards. We saved a small fortune on cat litter (plus very little to add to a landfill).
We trained them to come in after dark with the offer of treats - it never failed.
I feel it is vital to have an open cat door whenever a cat is outside so they can escape any dangers.
Sharon in Maine