R. H. Keffen

High mortality associated with megabacteriosis of proventriculus and gizzard in ostrich chicks

F. W. Huchzermeyer, M M Henton, R. H. Keffen · Veterinary Record · 1993 · 40 citations

Agriculture, Microbiology, Poultry Science +14

SOME PHYSICAL REQUIREMENTS FOR OSTRICH EGG INCUBATION

M. J. F. Jarvis, R. H. Keffen, Charles E. Jarvis · Ostrich · 1985 · 39 citations

Agriculture, Animal Sciences, Zoology +13

Breeding seasons and laying patterns of the southern African Ostrich <i>Struthio camelus</i>

M. J. F. Jarvis, Charles E. Jarvis, R. H. Keffen · Ibis · 1985 · 32 citations

Life Sciences, Animal Sciences, Zoology +13

SOME MEASUREMENTS RELATING TO OSTRICH EGGS

R. H. Keffen, M. J. F. Jarvis · Ostrich · 1984 · 18 citations

Agriculture, Animal Sciences, Zoology +13

A preliminary investigation into the immobilising potential of a tiletamine/zolazepam mixture, metomidate, a metomidate and azaperone combination and medetomidine in ostriches (Struthio camelus)

J. Van Heerden, R. H. Keffen · Journal of the South African Veterinary Association · 1991 · 18 citations · Full text

Veterinary Medicine, Pharmacology, Veterinary Pharmacology +9