You have to find out how they're sneaking out. It can be from the window and you can fix the window with new screening. Or if it's by the door, just be cautious when you open it.
keep it outside!
being locked in your room is a punishment, if you keep sneaking out while grounded then it is only right you should be locked up
only to go outside to keep them from running away
You should not let your cat go outside and keep it well fed.
To prevent your cat from fighting outside, you can keep them indoors, provide enough mental and physical stimulation, spay or neuter your cat, and use deterrents like motion-activated sprinklers or noise devices.
grow dwarf trees
You prevent your cat from having access to your hamster. Keep your hamster caged at all times unless supervised by an adult. If the cat is aggressive, keep the cat in a seperate room or outside when you take the hamster out.
Placing a cat litter tray outside may not be safe as it can attract other animals, spread diseases, and expose your cat to potential dangers. It is recommended to keep the litter tray indoors to ensure your cat's safety and hygiene.
Use the mighty power of OXY-Clean
nothing that's why god gave it fur dugh!! have a nice day.
Slowly let your cat outside less and less until the cat doesn't go out at all.
what you do is let him keep meowing. Show the cat some love and pet it so it is distracted. Maybe give it a treat and keep showing it love. if it tried going outside, then you should consider a cage or crate.