Animal waste pad holder

1. A holder for a disposable waste pad comprising:

a base;

three sidewall extensions removably attachable to the base;

the base having a substantially planar bottom panel for holding the disposable waste pad,

the base having four sidewalls integrally formed with and located near a periphery of the bottom panel, the four sidewalls being substantially perpendicular to and extending above the bottom panel by a first height;

the four sidewalls having top surfaces substantially parallel to the bottom panel;

at least two deformable waste pad retainers formed in the top surface of one or more sidewalls for removably retaining the disposable waste pad substantially between the four sidewalls;

the sidewalls having the three sidewall extensions extending from the top surface of the sidewalls;

the three sidewall extensions being perpendicular to the plane of the bottom panel and extending upward from the bottom panel by a second height that is substantially greater than the first height of the base sidewalls;

each one of the three sidewall extensions being coupled to an adjacent sidewall extension and foldable relative to each adjacent sidewall extension to enable the plurality of sidewall extensions to be folded into one flat configuration;

each one of the at least three sidewall extensions being rigid with a plurality of perforations extending completely through the three sidewall extensions and spaced along a length of each sidewall extension.

2. The holder of claim 1 wherein the waste pad retainer includes a clamp on a sidewall not having a sidewall extension extending from the top surface for holding a first end of the disposable waste pad, the clamp extending for substantially the entire length of the one sidewall.

3. The holder of claim 2 further comprising a means for retaining the waste pad located on a top surface of the planar bottom panel.

4. The holder of claim 1 wherein the base is formed from two separably connected base sections.

5. The holder of claim 4 wherein each of the sidewall extensions has a length and a width less than a second length and a second width respectively, of one of the base sections.

6. The holder of claim 1 wherein adjacent sidewall extensions are connected by a removable corner piece.

7. The holder of claim 1 wherein adjacent sidewall extensions are connected by a flexible joint.

8. The holder of claim 1 wherein one of the sidewall extensions is comprised of two separable pieces.

9. A holder for a disposable waste pad comprising:

a base having a substantially planar bottom panel for holding the disposable waste pad;

the base having four sidewalls integrally formed with the bottom panel, the four sidewalls being substantially perpendicular to and extending above the bottom panel by a first height that is substantially less than a width or length of the bottom panel;

the four sidewalls having top surfaces substantially parallel to the bottom panel and an interior face substantially perpendicular to the planar bottom panel;

the top surface or interior face of one or more of the four sidewalls including at least two waste pad retainers for removably retaining the disposable waste pad substantially between the four sidewalls;

the at least two waste pad retainers located either substantially on each end of one of the four sidewalls or on two different sidewalls;

a plurality of sidewall extensions removably attachable to the sidewalls without interfering with operation of the at least two waste pad retainers, the sidewall extensions being substantially perpendicular to the plane of the bottom panel and the sidewall extensions extending upward from the bottom panel by a second height that is substantially greater than the first height of the base sidewalls;

each one of the sidewall extensions being coupled to an adjacent sidewall extension and foldable relative to each adjacent sidewall extension to enable the plurality of sidewall extensions to be folded into a flat configuration;

each one of the sidewall extensions being rigid with a plurality of perforations extending completely through the sidewall extensions and spaced across the length of each sidewall extension.