Present study was planned to assess the spectrum of natural occurrence of aflatoxins, zearalenone, ochratoxin A and A-B trichothecenes in dairy feed, silage and total mixed rations.  One hundred and seventy one samples were analyzed by chromatographic technique. In cattle compound feed, there was a high incidence of aflatoxin B₁ (97.31%) followed by aflatoxin B₂ (50.33%), aflatoxin G₁ (10.74%)_, aflatoxin G₂ (1.47%), zearalenone (39.25%), ochratoxin A (37.5%) and deoxynivalenol (2.96%) with average values of 29, 8, 21, 10, 862, 64 and 813 ng/g respectively. Nine samples were found tainted with T-2 toxin (282ng/g), nivalenol (285ng/g) and fusarenon-x (1625ng/g) respectively. However, frequency distribution showed that positive seventy-seven (51.59%)samples found to be contaminated with aflatoxin B₁ levels higher than permissible level of European Commission (<20ng/g).  For zearalenone, forty-four (32.50%) samples were tainted with levels ranging from ≥500 to 3750ng/gi.e. higher than recommendations by European commission (<500ng/g). In contrast to compound feed, mycotoxin analysis in silage samples demonstrated the high prevalence of ochratoxin A (77.77 %) followed by AFB₁ (25%) with mean of 53 and 8.71ng/g respectively. A scrutiny of mycotoxin for total mixed ration depicted that all samples were contaminated with aflatoxin B₁ and ochratoxin A with an average of 30 and 48.5ng/g respectively. As far as multi-mycotoxin co-existence is concerned, compound feed was concurrently contaminated with two, three and four types of mycotoxins.

Key words: Co-contamination, Dairy, Feed, Mycotoxins, Silage