The invention relates to an assembly (1) comprising: - a package (2) comprising a support (4) comprising a plurality of recesses (7) forming cells, and a plurality of separate covers (5), each cover (5) ) covering a respective cell and being heat sealed on the support (4), and - a plurality of solid blocks (3), each solid block (3) being contained in a cell, in which each solid block (3) constituting a complementary food intended for animals and has a length (L) of between 80 and 90 millimeters and a width (l) of between 20 and 30 millimeters. Figure for the abstract: Fig. 1
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