How to Resize or Rebuild Your Mau Castillo Cat Cave for a Perfect Fit

Quick answer

To resize or rebuild your Mau Castillo cat cave, measure your cat's height, customize the entrance and interior by adding or repositioning cushions, and check that the cave isn't too cramped. Start with simple adjustments like using the Large Platform Bed for extra lounging space, and only consider structural changes if your cat still feels restricted.

When your cat is more of a sprawler than a curler, the cozy dimensions of the Mau Castillo cat cave might need a little tweaking. Whether your kitty has grown or simply prefers a more spacious hideout, you can adjust the cave without discarding it. This guide walks you through safe, practical ways to resize or rebuild your cat cave for a better fit.

Resizing isn't just about comfort—it's about making sure the cave remains a secure, enriching spot. A cave that's too small can stress your cat, while one that's too open defeats the purpose. With a few tools and some creativity, you can create a custom fit your feline will love.

Assess Your Cat's Size and Preferences

Before making any changes, measure your cat's length from nose to base of tail and note their preferred sleeping posture. Cats that stretch out need more horizontal space, while those that curl up are fine with a snugger cave. Also observe whether they enter the cave readily or hesitate—this can signal discomfort with the current size or shape.

Compare your measurements to the interior of the Castillo. The cave's circular design and raised sides offer a defined space, but if your cat's length exceeds the interior, it's time to consider adjustments. Also check for signs like pawing at the entrance or frequent exits, which may indicate the cave is too small or too cramped.

• Use a soft tape measure to get accurate dimensions without startling your cat.
• Watch your cat's body language: a relaxed tail and purring indicate comfort, while flattened ears signal irritation.

Customize the Interior for Extra Room

One of the simplest ways to resize the cave is to adjust the cushioning. The Castillo comes with a machine-washable faux fur cushion, but you can replace it with a thinner or larger option to maximize usable space. For example, the Large Platform Bed (18" x 14") can be placed inside as a flat lounging surface, giving your cat a stretch-out spot without the bulk of a thick cushion.

If you prefer a cozier feel, you can add a plush lining like the Natural Basket (Customize) cushion, but be mindful of the dimensions. The basket is designed for Ivy cat trees and may not fit perfectly inside the Castillo, so measure carefully before trying. The goal is to create a comfortable, non-restrictive environment—not to overstuff the cave.

• Test different cushion thicknesses to see which your cat prefers.
• Ensure the cushion doesn't block the entrance or create a barrier.

Adjust the Entrance for Easier Access

If your cat struggles to enter, the entrance may be too small or positioned awkwardly. You can gently widen the opening by trimming the felt—this works best on wool felt like the Horizon Cat Cave, but the Castillo's structure may allow similar modifications. Use sharp scissors and cut only a small amount at a time to avoid over-widening. Always leave a clean edge to prevent fraying.

Alternatively, you can reposition the cave by rotating it so the entrance aligns with your cat's preferred path. Some cats prefer a side entrance, so if your Castillo has an asymmetric design, test different orientations. This simple tweak can make the cave seem more inviting without any structural changes.

• Practice on an old piece of felt first to refine your cutting technique.
• Check for any loose threads after cutting and trim them to prevent snags.

Reposition or Attach to a Cat Tree

Rebuilding your cat cave might mean giving it a new location. If your cat prefers height, you can place the Castillo on a sturdy cat tree platform. The Large Platform Bed can serve as a base—it's designed to fit all models and perches, providing a stable 18" x 14" surface. Make sure the platform is level and securely attached before placing the cave on top.

Alternatively, you can incorporate the cave into a multi-level setup by placing it under a taller perch. This creates a vertical den that saves floor space and gives your cat a secure hiding spot. Just ensure the cave isn't squeezed too tightly, as cats need space to enter and turn around.

• Use existing hardware from your cat tree, or purchase a mounting kit for a secure fit.
• Place the cave at a height your cat already uses—don't force a new high spot if they're not climbers.

Maintain and Clean for Longevity

After resizing, keep the cave clean to maintain its integrity. The Castillo's cushion is machine-washable, and the wool felt can be spot-cleaned with a damp cloth. Regular cleaning prevents odors and extends the life of the cave. Also, inspect the structure periodically for wear, especially if you've made modifications.

If the cave becomes damaged during your adjustments, consider replacement parts from Mau. For example, the Repair Rope is designed for cat trees with natural branch trunks, not the Castillo, but Mau offers various cushions and parts that can refresh your setup. Always check compatibility before ordering.

• Vacuum the interior weekly to remove fur and dust.
• Avoid using harsh chemicals on the felt—stick to mild soap and water.

Step-by-step resizing process

1. Measure your cat: Measure nose-to-tail length and observe whether they stretch or curl when sleeping. This helps determine if they need more horizontal space. Check that the measurement is accurate; most cats are within 18 inches, but larger breeds may need more.
2. Choose a cushion adjustment: Decide whether to add a flatter cushion like the Large Platform Bed for more space, or keep the original thick cushion for snugness. Remove or swap the cushion to match your cat's preference. Test one option at a time to see which your cat uses most.
3. Modify the entrance if needed: Carefully widen the opening using sharp scissors, cutting in small increments. Alternatively, rotate the cave to change the entrance orientation. Stop cutting once your cat enters confidently; over-widening reduces the cozy feel.
4. Relocate or mount the cave: Place the Castillo on a stable platform like the Large Platform Bed on a cat tree, or reposition it in a quiet corner. Ensure it's level and secure. Watch your cat's reaction; if they ignore it, try a different location.
5. Monitor and clean: After adjustments, observe your cat's usage and keep the cave clean. Regular washing of the cushion and spot-cleaning the felt will maintain freshness. Adjust further if your cat still seems hesitant—comfort is key.

Products that can help with resizing

• Large Platform Bed: Fits ALL models and perches. Design Large 18" x 14" platform bed for kitties that like to stretch and lounge. Includes a thin cushioned layer of cushion under the fabric, providing extra comfort. The platform is attached to the trunk on the left or right side, not the center. This platform can serve as a spacious, sturdy base for your Castillo when placed on a cat tree, giving your cat extra room to stretch without the bulk of a thick cushion.
• Natural Basket (Customize): Designed to pair with Ivy or Ivy 3 cat trees, this basket can be tailored to suit your home’s decor and your cat’s comfort preferences. Choose from a variety of cushion and pom-pom color combinations. If you want to add a soft, customizable interior liner to your Castillo, the Natural Basket's cushions can be repurposed for extra comfort, but verify dimensions first to ensure a proper fit.

Resizing or rebuilding your Mau Castillo cat cave doesn't have to be complicated. By measuring your cat, customizing the interior, adjusting the entrance, and repositioning the cave, you can create a custom fit that keeps your feline happy and secure. Remember to maintain the cave regularly and use products like the Large Platform Bed to enhance its versatility.