It sounds like you’ve already made the biggest and most important decision — prioritising safety over tradition. Many people in the UK still let cats roam, but attitudes are slowly shifting, especially among those who’ve experienced accidents or illnesses from outdoor life.
Here are some practical tips and considerations for keeping indoor cats happy and healthy — especially since yours are older rescues:
1. Mental stimulation
Interactive play: Wand toys, feather teasers, and battery-operated toys mimic prey and help burn energy.
Food puzzles: Slow feeders and puzzle toys give them a hunting “challenge.”
Rotation of toys: Swap them out weekly so the novelty doesn’t wear off.
2. Territory & vertical space
Cat trees and shelving: Cats love height and vantage points.
Window perches: Give them safe spots to watch birds and people.
Hideaways: Boxes, tents, or igloo beds help them feel secure.
3. Catio benefits
A catio (or “cat run”) is an excellent compromise — they’ll get sunshine, fresh air, and stimulation without the risk of cars, fights, or diseases.
Make sure it’s weather-proofed and has shade as well as sheltered spots for rain.
Include climbing areas, scratching posts, and plants safe for cats (e.g., cat grass, catnip).
4. Enrichment through scent & sound
Cat-safe herbs and plants can keep things interesting.
Play bird sounds or nature videos occasionally for visual and auditory enrichment.
5. Health & routine
Indoor cats can live longer, but they still need yearly vet checkups and vaccinations — some diseases can spread through windows or on shoes.
Keep their weight in check — indoor cats can be prone to overeating out of boredom.
6. Transition tips
Since yours have never been outside, you’re not fighting a habit, which makes things easier.
Start with the catio door open during supervised sessions so they associate it with safety, not escape attempts.
One unexpected bonus people often find is that indoor cats tend to be more relaxed and less territorial toward other cats in the neighbourhood — because they never have those stressful “garden stand-offs.”
If you want, I can give you a few low-cost enrichment ideas so the catio feels like a mini adventure park for them. That way, they’ll get maximum enjoyment from it.