What is claimed is:
1. An antiblister cage mat arrangement for cage-raising broilers and deterring the development of blisters on the keel or breast bone skin or meat of the broilers, comprising in combination with an open mesh cage floor, mat means comprising a body including an outer dimension substantially conforming to and overlying the mesh floor of the cage,
said mat means including a generally planar lower surface and a repetitive series of through openings, said openings being defined on at least two sides by marginal, tubular, resilient elements.
2 The structure as claimed in claim 1 in which the openings are at least three-fourths inch along one dimension for preventing the breast bone of a normal 4-week-old broiler from engaging the mesh floor beneath the mat means.
3. An antiblister cage mat arrangement for cage-raising broilers and deterring the development of blisters on the keel or breast bone skin or meat of the broilers, comprising in combination with an open mesh cage floor, mat means comprising a body including an outer dimension substantially conforming to and overlying the mesh floor of the cage, said mat means including a generally planar lower surface and a repetitive series of through openings, said openings being defined on at least two sides by marginal resilient elements which are at least partially tubular.
4. The structure as claimed in claim 3 in which said series of repetitive openings are rectangular and are bordered on all sides by three-dimensional elements having an arcuate cross section.
5. The structure as claimed in claim 4 in which said border ing elements define a rectangular opening and are semicircular in cross section.
6. The structure as claimed in claim 4 in which said bordering elements are tubular.
7. The structure as claimed in claim 6, in which said bordering elements are elliptical in cross section.
8. The structure as claimed in claim 3, in which said openings are elongated and rectangular in plan, defined by said resilient elements which are in the form of two side ribs extending in substantially mutually parallel relation, the ribs being three-dimensional and connected adjacent the lower margin thereof by transverse straps.
9. The structure as claimed in claim 8 in which said ribs are arcuate in cross section and said straps are flat, project between the lower edges of the arcuate ribs.