Oil-Dri Corporation of America (NYSE:ODC) stock fell 0.14% (As on Oct 14, 11:52:30 AM UTC-4, Source: Google Finance) after the company in the fourth quarter of FY 21 has reported 20% rise in the consolidated net sales to an all-time quarterly high of $78 million. Fourth quarter consolidated net income attributed to Oil-Dri was $603,000 in fiscal 2021 compared to $5.9 million in fiscal 2020. Cash and Cash Equivalents has decreased to $24.6 million in fiscal 2021 from $41 million in fiscal 2020, on the back of higher cost of goods sold and a significant fiscal 2020 bonus payout which was paid in fiscal 2021. Debt decreased to $9 million in fiscal 2021 from $10 million in the prior year.
Moreover, the sales from the cat litter, industrial and sports, and agricultural businesses drove the majority of this growth. Thee demand for fluids purification products and co-packaged coarse cat litter also increased in the fourth quarter over the prior year, while revenues from the animal health and nutrition products were essentially flat. Fourth quarter consolidated gross profit declined by approximately $1.5 million, while margin was reduced to 19% in fiscal 2021 from 21% in fiscal 2020. Although revenues grew significantly in the quarter, these gains were offset by a 7% increase in domestic cost of goods sold per manufactured ton compared to the prior year. In the fourth quarter of fiscal 2021, the consolidated operating income was $1.7 million compared to $9.1 million in fiscal 2020. Revenue increases and a $4 million, or 24%, reduction in SG&A expenses were partially offset by significantly higher cost of goods sold.
Furthermore, the Business to Business Products (“B2B”) Group’s fourth quarter revenues reached a record $30 million, a 13% gain over the prior year. This increase was mainly driven by strong revenue growth from the agricultural and fluid purification businesses. Sales of agricultural products increased by 37% over the prior year, as demand from one of our largest customers rose in the quarter. The B2B Products Group also benefited from a 7% increase in revenues within the fluids purification business. Sales of bleaching clay products were strong in North America and Latin America, while softer revenues were experienced in Europe and Asia.
In addition, fourth quarter revenues of animal health products remained flat compared to the same period last year. African Swine Fever and the ongoing pandemic created challenges for the global animal protein production market, including feed additives. However, the company has achieved sales increases of 66% in China during the fourth quarter compared to the prior year, as well as top line growth in Asia, Latin America, and North America.