this invention is directed to an improved poultry nest pad that encourages an increased egg production from egg laying hens . more specifically the invention is a gray poultry nest pad . the astroturf ® poultry nest pad produced by monsanto company , shown in two embodiments in fig1 and 2 , is the preferred shape for the poultry nest pad of this invention . this poultry nest pad is produced as a thermoplastic , three - dimensional , molded grass - like product such as that shown in u . s . pat . no . 3 , 507 , 010 , the specification of which is incorporated by reference . the poultry nest pad has a relatively flat matrix formed of parallel strips or ribs 21 separated by hollow , circular clusters or buds 22 from which projections 23 extend to simulate natural grass . the clusters 22 do not abut one another . they are separated from one another to provide openings or holes in the matrix between adjacent clusters 22 and through the center of the hollow clusters 22 to allow drainage through the poultry nest pad to enable easier cleaning of the nest pad and to enable waste or refuse from the hens to flow through the nest pad between cleanings . the projections 23 extending from the clusters 22 are essentially vertical after being molded , as shown in fig1 . to impart the appearance of natural grass it is necessary to texture the molded material to disperse the tips of the projections 23 randomly , much in the manner of natural grass . this may be conveniently done by applying a plate with pressure to the top of the molded material , that is , to the side from which the projections extend . this texturing imparts a permanent crimp in the projections 23 whereby they remain bent or flattened with the tips dispersed randomly over the surface , as shown in fig2 . while the poultry nest pad construction describe above is preferred , it is not the only construction that may be used . rubber mats , mats made of non - woven materials and plastic materials having other configurations may also be used without detracting from this invention . the important feature of this invention is the provision that the poultry nest pads must be gray in color . galvanized sheet metal color is the primary color seen by poults prior to their placement in the breeder house . poultry research indicates that poults are imprinted by what they see at this young age . thus , gray poultry nest pads resemble the galvanized sheet metal color and provide a more comfortable environment . the hens put on gray nesting appear to be more content than hens placed in houses with nest pads of other conventional colors and this encourages the hens to produce more eggs . up to thirty - five percent more eggs were laid in the gray poultry nest pads than in nest pads of other colors . the gray color utilized in this invention is specified as the color space defined by &# 34 ; the munsell system &# 34 ; in terms of hue , value and chroma as set out in the munsell ® book of color -- glossy finish collection , 1976 edition by macbeth ® division of kollmorgen , in which : the gray color utilized in this invention is more preferably specified as the color space defined by &# 34 ; the munsell system &# 34 ; in terms of hue , value and chroma as set out in the munsell ® book of color -- glossy finish collection , 1976 edition by macbeth ® division of kollmorgen , in which : an expanded view , or more detail , of a portion of the color space defined above is presented in the munsell ® book of color -- nearly neutrals ™ collection , 1991 edition by macbeth ® division of kollmorgen . in addition to the definition above , the gray color may be specified as the color space defined as n3 through n9 inclusive , and preferably as n4 through n8 . 5 inclusive , as set out in the munsell ® neutral value scale , 1971 edition by macbeth ® division of kollmorgen . the most common color currently used for nest pads is brown . a study was made to compare the results of using different colors for the poultry nest pads . in the study brown nest pads were compared in separate tests to red , green , black and gray nest pads . for the study , newly hatched chicks were raised and the nest pads were introduced during the chicks &# 39 ; twentieth week . four groups of chicks were used in each test . in test 1 brown and black nest pads were compared , in test 2 brown and green nest pads were compared , in test 3 brown and gray nest pads were compared , and in test 4 brown and red nest pads were compared . in each test , an equal number of nest pads of each nest pad color were used . during the twenty - eighth and the thirty - second weeks , the number of eggs in each nest during a period of five days were counted . the number of eggs in the nests of each nest pad color were averaged to determine the number of eggs per nest per five day period ( eggs / nest / 5 day period ) and the results are shown in table 1 . table 1______________________________________nest color eggs / nest / 5 day period______________________________________brown 16 . 5black 14 . 7brown 17 . 5green 16 . 1brown 14 . 7gray 19 . 9brown 16 . 2red 17 . 0______________________________________ in the tests comparing brown and black , brown and green , and brown and red nest pads , the hens did not exhibit any significant preference for one color of nest pad over the other color of nest pad . there was even a slight preference for the brown pad over the black and green pads . however , in the test comparing the brown nest pad to the gray nest pad , the difference in egg production was significant as there were more than thirty - five percent ( 35 %) more eggs laid in the nests having the gray nest pad than in the nests having the brown nest pad . it will be apparent from the foregoing that many other variations and modifications may be made in the apparatus herein before described , by those having experience in this technology , without departing from the concept of the present invention . accordingly , it should be clearly understood that the apparatus depicted in the accompanying drawings and referred to in the foregoing description are illustrative only and not intended to have limitations on the scope of the invention .
a gray poultry nest pad is taught . the gray color is defined by the &# 34 ; munsell system &# 34 ; comprising a hue of 2 . 5r through 10rp inclusive , a value of 3 through 9 inclusive and a chroma of 0 through 2 inclusive .