By 1905, Delamere was a pioneer of the East African dairy industry. He was also a pioneer at crossbreeding animals, beginning with sheep and chicken, then moving to cattle; most of his imported animals, however, succumbed to diseases such as foot and mouth and Red water disease. Delamere purchased Ryeland Rams from England to mate with 11,000 Maasai ewes, and in 1904, imported 500 pure-bred merino ewes from New Zealand. Four-fifths of the merino ewes quickly died, and the remaining stock were moved to Delamere's Soysambu Ranch, as well as the remaining stock of 1,500 imported cattle that suffered from pleuro-pneumonia.