ZENY Cat Cage Indoor Cat Enclosures DIY Cat Playpen 3-Tiers Kennels Pet Crate with Extra Large Hammock for 1-2 Cats, Ferret, Chinchilla, Rabbit, Small Animals

I placed a wire crate panel in the frame of the window. You can't close the window while it's on but it was the only method I had for an expert level escapee. I put a few panels together, 2 horizontal, 3 vertical (based on window size) with the connections and zip ties to keep it strong and steady. I used items from this crate: https://www.walmart.com/ip/12715017484?sid=d2cdc03b-30d3-48de-b2c9-7497b3e60266