For maximum safety, opt for a cage that is large enough in diameter so that your bird can avoid any probing paws that your cat might stick through the bars by retreating to the center of the cage.
You can also invest in a solid door for the birdcage rather than a door with bars on it to better keep your animals from being able to open it.
For best results, opt for a birdcage with bars made of metal instead of plastic. Metal bars are much stronger than plastic ones and will do a better job of keeping your animals separated.
The best location for your birdcage is in the corner of a quiet room, where there are 2 walls located behind it. This will make the cage feel more like a safe nest for your bird. You can buy perches and nest boxes for your birdcage at any pet store that sells bird supplies.
You can buy a cage cover specifically designed for birdcages at any pet store that sells bird supplies. You can also repurpose a large piece of fabric to use as a cover, as long as it is thick enough to block out light. For best results, make sure your cage cover is machine washable. It will definitely accumulate dust and dander after being draped over your birdcage multiple times.
If your cat still attacks the birdcage even when you’re in the same room, you may have to ban your cat from that room entirely and always keep the door closed.
There are lots of different toys you can buy for your cat that will keep its interest. Look for these toys at any pet store. If your cat is interested in birds and the outdoors in general, consider investing in a cat tower and placing it near a window. This will allow your cat to focus on birds in the wild instead of the one in your house.
You can buy this type of enclosure, called a “catio,” at most of the larger pet supply companies, such as PetSmart and Pet Supplies Plus.