RESUMEN
The objective was to evaluate the subsitution of Tifton 85 hay (Cynodon sp.) For hay or silage (Manihot sp.) In diets without defined breed growing on weight gain, carcass yield and commercial cuts. We used 24 (twenty four) animals, with initial weight of 19.77 ± 1.95 kg and average age of six months, distributed in a randomized block design. The total duration of the experiment was 71 days, 15 days for diet adaptation and 56 for data collection. There was no difference in crude protein (P> 0.05) difference was found for the consumption of neutral detergent fiber between treatments (P 0.05) for carcass weight and yield, loss of cooling (LC) and true yield (RV) between treatments. There was no difference in the yields of cuts (%) by the use of hay or silage to replace Maniçoba of Tifton. There was also no significant difference (P> 0.05) for the morphometric measurements of carcass. The hay and silage can replace Maniçoba Tifton hay in sheep feeding finishing without compromising weight gain, feed conversion, carcass yield and carcass characteristics.