Dog Mate 221 Small Dog Door White – 4-Way Locking Pet Door

The Dog Mate 221 Small Dog Door in White is a practical, durable pet door designed for small dogs and larger cats. With a generous opening, secure 4-way locking system and neat self-lining design, it gives your pet the freedom to come and go while allowing you to control when they can enter or leave.

Suitable for small dogs up to approximately 360mm (14") shoulder height, the Dog Mate 221 is a particularly good choice for breeds such as Yorkshire Terriers, Pekingese and Dachshunds, as well as larger cats that need more room than a standard cat flap provides.

Ideal for Small Dogs and Large Cats

The Dog Mate 221 sits between a conventional cat flap and a medium dog door, making it an excellent choice when a standard cat flap is simply too small.

It is suitable for many small dogs and larger cats, including:

• Yorkshire Terriers
• Pekingese
• Dachshunds
• Small terriers
• Similar small dog breeds
• Large and heavier-built cats

We always recommend measuring your pet before ordering rather than choosing a pet door based on breed alone.

4-Way Locking System

The built-in 4-way locking system gives you control over how your pet uses the door.

• In & Out – Your pet can enter and leave freely.
• In Only – Your pet can come inside but cannot go back out.
• Out Only – Your pet can leave but cannot come back through the flap.
• Locked – Prevents use of the pet door in either direction.

This is particularly useful when you want your dog or cat indoors overnight or need to control access at particular times of the day.

Self-Lining Pet Door

The Dog Mate 221 features a self-lining design that creates a much neater finish through the door or panel than an unlined pet flap.

The frame can accommodate installations up to approximately 50mm (2") thick, making it suitable for many common door and panel applications.

Suitable for Doors and Panels

The Dog Mate 221 can be fitted into a variety of suitable materials, including:

• Timber doors
• uPVC door panels
• PVC panels
• Composite panels where suitable
• Internal doors
• Other suitable flat panels

Always check the construction of your door before cutting, particularly with reinforced, composite or glazed doors.

Wall Installation

The Dog Mate 221 can also be used for suitable wall installations. A wall opening will require an appropriately constructed and lined tunnel between the two sections of the pet door.

If you're unsure about installing this pet door through a wall, contact us before ordering. CatFlaps.co.uk has decades of experience supplying pet doors and we're always happy to help with product selection and installation questions.

Weather-Resistant Flap

The transparent flap allows your pet to see through the opening, which can make it easier for nervous dogs and cats to become accustomed to using their new pet door.

A magnetic closure helps return the flap to its normal closed position after your pet passes through, while the surrounding design helps reduce unwanted draughts.

Key Features

• Genuine Dog Mate 221 small dog door
• White frame with transparent flap
• Suitable for small dogs and larger cats
• Recommended for pets up to approximately 360mm (14") shoulder height
• Secure 4-way locking system
• Self-lining design
• Suitable for installations up to approximately 50mm (2") thick
• Magnetic flap closure
• Suitable for timber doors and many uPVC door panels
• Can be used for suitable wall installations
• No batteries or electrical supply required
• Easy-clean durable construction
• 3-year manufacturer's warranty

Dog Mate 221 Dimensions

• Overall Width: 235mm (9.25")
• Overall Height: 252mm (10")
• Cut-Out Width: approximately 210mm
• Cut-Out Height: approximately 227mm
• Maximum Pet Shoulder Height: approximately 360mm (14")
• Maximum Installation Thickness: approximately 50mm (2")
• Colour: White

Measure Your Dog Before Ordering

Breed recommendations should only be used as a guide because dogs of the same breed can vary considerably in size.

Before ordering, measure your dog's shoulder height and body width and compare these measurements with the pet door opening.

Your pet should be able to pass comfortably through the opening without having to squeeze through the frame.

What's Included?

• 1 × Dog Mate 221 Small Dog Door – White
• Front and rear frame sections
• Transparent pet flap
• Fixing screws
• Screw covers
• Installation instructions

Replacement Flaps Available

One of the advantages of choosing a Dog Mate pet door is the availability of replacement parts. If the transparent flap eventually becomes scratched, worn or damaged, a replacement flap is available separately, allowing you to repair the existing pet door rather than replacing the complete unit.

Frequently Asked Questions

Is the Dog Mate 221 suitable for dogs?

Yes. The 221 is designed for small dogs as well as larger cats. It is commonly referred to as the Dog Mate 221 Small Dog Door.

What size dog can use the Dog Mate 221?

It is intended for small dogs up to approximately 360mm (14") shoulder height. However, always measure your individual pet before ordering.

Can a large cat use it?

Yes. Its larger opening makes the 221 an excellent option for large cats that may find an ordinary cat flap restrictive.

Does it have a lock?

Yes. The Dog Mate 221 has a 4-way locking system, allowing you to select free access, in only, out only or completely locked.

Does it require batteries?

No. The Dog Mate 221 is a completely mechanical pet door and requires no batteries, mains electricity, microchip or collar key.

Can I fit it into a uPVC door?

It can be installed into many uPVC door panels. Check the construction and thickness of the panel before cutting, particularly if it contains reinforcement or other structural components.

Can it be installed through a wall?

Yes, suitable wall installations are possible, although the opening between the frames will need to be properly lined to create a finished tunnel.

Can I buy a replacement flap?

Yes. Replacement flaps for the Dog Mate 221 are available separately, so normal wear or accidental flap damage does not necessarily mean replacing the complete pet door.

Why Buy Your Dog Mate 221 from CatFlaps.co.uk?

We've been supplying pet doors and replacement parts for many years and have extensive experience with Cat Mate and Dog Mate products. If you're replacing an older pet door, aren't sure whether the 221 will fit your existing opening or need help choosing the correct size, contact us and we'll be happy to help.

The Dog Mate 221 White Small Dog Door is a simple, reliable choice for small dogs and larger cats, combining a generous opening, 4-way access control and a neat self-lining design in one easy-to-use pet door.