 Analysis of minor allergens by immunoblot 2 D, ESPCI frozen serum3 prick tests 4 1 or 2 oral provocation test TPO double blind, during 2 days At M12 :1 Clinical examination2 Biological test blood sample 16.5 mL : WBC, ferritin, total IgE, specific IgE, cow milk, ALPHALACTALBUMIN, casein, BETALACTOGLOBULIN and goat milk using RAST Specific secretory IgA by ESPCI frozen salivaBiologic collection- Specific immunoglobulins against cow milk, ALPHALACTALBUMIN, casein, BETALACTOGLOBULIN , quantification of IgM, sub classes of IgG and IgA by ESPCI frozen serum. 