The study was conducted with objective being to evaluation feed options for Raya cattle bulls to attain export market weight. A total of 15 pure Raya cattle breed at age of three years were purchased from local markets using phenotypic and dentition . Experimental animals were drenched with a broad spectrum anti-helminthic and sprayed against external parasites. Feeding trial was carried out for 90 days following 15 days adaptation period. The experiment was conducted using a randomized complete block design with three treatments and 5 replication blocks. Feeding options, teff straw with maize grain 20%, wheat bran 45% and noug cake 35% (Treatment 1), teff straw with molasses 20% , wheat bran 40% and cotton seed cake 40% (Treatment 2) and teff straw with wheat bran 65% and dried brewers' gains 35%(Treatment 3) were used. Data such as Daily feed offered, refused, feed conversion ratio, feed conversion efficiency, live weight gain, carcass yield and partial cost analysis were collected. Data were subjected to analysis of variance using the general linear model procedure of SAS. Significant treatment means were separated using Tukey HSD. Cattle supplemented with T2 had higher total dry matter intake (TDMI) (7 kg/day) and average daily body weight gain (815.5 g/day). Beside this, cattle placed on T2 had higher hot carcass (126 kg), chilling meat (93 kg) and total edible offal (150.6 kg), lean meat weight (95.3 kg) and meat to bone ratio (4.1). However, there were no significant difference (P>0.05) among treatments on trimming and bone weight. However, cattle placed in T3 had higher net income (1075 birr/head) compared to T1 (458 birr/head) and T2 (150 birr/head). Therefore, it can be concluded that T3 had more economical advantage and recommended to fatten three years old Raya bull breed.

Keywords: Age, Breed, Cattle, Concentrate, Export weight, Raya bull, Straw