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✈ *Over $99 & Under 10lbs Ships Free (US 48 Only)
Free Shipping on incubators for a limited time (US 48 Only)
✈ *Over $99 & Under 10lbs Ships Free (US 48 Only)
Free Shipping on incubators for a limited time (US 48 Only)

Expansion Rooms

Our Whelping box extension, The MagnaPen Extension pen, is the perfect addition to the MagnaBox Next Generation Professional Whelping Box.  The whelping box extension pen easily attaches to the front of the whelping box and uses the same hook and slot joints as the whelping box.  The MagnaPen incorporates the same 1/3 and 2/3 height doors for easy access and control. It is simple to clean and keep clean.  FDA approved, HDPE plastic (a common material for kitchen cutting boards) is UV resistant and will not rust, stain or discolor.  Unlike wood and other plastic whelping boxes, the MagnaPen Extension Pen has no cracks, crevices, porous or painted surfaces to retain contamination. Available in solid or slatted style.

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  • Original price $349.00
    Original price $349.00 - Original price $349.00
    Original price $349.00
    Current price $325.00
    $325.00 - $325.00
    Current price $325.00

    MagnaBox Solid Extension Pen X-Small (30" x 30" x 15")


    MagnaBox Solid Extension Pen X-Small (30" x 30" x 15")The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep clean. FDA...

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  • Original price $949.00
    Original price $949.00 - Original price $949.00
    Original price $949.00
    Current price $899.00
    $899.00 - $899.00
    Current price $899.00

    MagnaBox Slatted Extension Pen X-Large (54" x 54" x 24")


    MagnaBox Slatted Extension Pen X-Large (54" x 54" x 24")The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep clean. F...

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  • Original price $549.00
    Original price $549.00 - Original price $549.00
    Original price $549.00
    Current price $512.50
    $512.50 - $512.50
    Current price $512.50

    MagnaBox Slatted Extension Pen Small (36" x 36" x 18")


    MagnaBox Slatted Extension Pen Small (36" x 36" x 18")The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep clean. FDA...

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  • Original price $799.00
    Original price $799.00 - Original price $799.00
    Original price $799.00
    Current price $762.50
    $762.50 - $762.50
    Current price $762.50

    MagnaBox Solid Extension Pen X-Large (54" x 54" x 24")


    MagnaBox Solid Extension Pen X-Large (54" x 54" x 24")The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep clean. FDA...

    View full details
  • Original price $479.00
    Original price $479.00 - Original price $479.00
    Original price $479.00
    Current price $437.50
    $437.50 - $437.50
    Current price $437.50

    MagnaBox Solid Extension Pen Small (36" x 36" x18")


    MagnaBox Solid Extension Pen Small (36" x 36" x18") The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep cle...

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  • Original price $749.00
    Original price $749.00 - Original price $749.00
    Original price $749.00
    Current price $712.50
    $712.50 - $712.50
    Current price $712.50

    MagnaBox Slatted Extension Pen Large (48" x 48" x 20")


    MagnaBox Slatted Extension Pen Large (48" x 48" x 20")The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep clean. FDA...

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  • Original price $649.00
    Original price $649.00 - Original price $649.00
    Original price $649.00
    Current price $600.00
    $600.00 - $600.00
    Current price $600.00

    MagnaBox Slatted Extension Pen Medium (42" x 42" x 18")


    MagnaBox Slatted Extension Pen Medium (42" x 42" x 18")The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep clean. FD...

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  • Original price $299.95
    Original price $299.95 - Original price $299.95
    Original price $299.95
    Current price $281.25
    $281.25 - $281.25
    Current price $281.25

    MagnaBox Solid Extension Pen XX-Small (24" x 24" x 12")


    MagnaBox Solid Extension Pen XX-Small (24" x 24" x 12")The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep clean. FD...

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  • Original price $549.00
    Original price $549.00 - Original price $549.00
    Original price $549.00
    Current price $525.00
    $525.00 - $525.00
    Current price $525.00

    MagnaBox Solid Extension Pen Medium (42" x 42" x 18")


    MagnaBox Solid Extension Pen Medium (42" x 42" x 18") The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep clean. FDA...

    View full details
  • Original price $649.00
    Original price $649.00 - Original price $649.00
    Original price $649.00
    Current price $600.00
    $600.00 - $600.00
    Current price $600.00

    MagnaBox Solid Extension Pen Large (48" x 48" x 20")


    MagnaBox Solid Extension Pen Large (48" x 48" x 20")The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep clean. FDA a...

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  • Original price $349.95
    Original price $349.95 - Original price $349.95
    Original price $349.95
    Current price $331.25
    $331.25 - $331.25
    Current price $331.25

    MagnaBox Slatted Extension Pen XX-Small (24" x 24" x 12")


    MagnaBox Slatted Extension Pen XX-Small (24" x 24" x 12")The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep clean. ...

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  • Original price $399.95
    Original price $399.95 - Original price $399.95
    Original price $399.95
    Current price $387.50
    $387.50 - $387.50
    Current price $387.50

    MagnaBox Slatted Extension Pen X-Small (30" x 30" x 15")


    MagnaBox Slatted Extension Pen X-Small (30" x 30" x 15")The MagnaBox Next Generation Professional Whelping Box is simple to clean and keep clean. F...

    View full details