Fifty-five Algerian white population rabbits were used to study the effect of the incorporation of Sulla hay (Hedysarum flexuosum) and common Reed leaves (Phragmites australis) in a pelleted feed on the growth of rabbits. At weaning (35 d), the rabbits were divided in two groups, individually caged and received ad libitum one of the two diets during 42 d. The control diet contained barley, dehydrated alfalfa, soya bean meal and wheat bran. The other diet (RS) was formulated to totally substitute barley and dehydrated alfalfa with Sulla hay and common Reed leaves. Feed intake increased distinctly in the RS group in the second period of fattening (150 vs 126). For the whole fattening period (35-77 d), growth rate was similar in the two groups (35.4 g/d) while the feed conversion was higher (p<0.01) in RS group (3.86 vs 3.23). This confirmed that using these fibre sources in a pelleted feed was valuable for fattening rabbit. . This confirmed that using these fibre sources in a pelleted feed was valuable for fattening rabbit. Keywords

<p>Simplified diets are based on maximum incorporation of fodder and/or by-products into animal feed, thus minimizing the formulation and the costs. This study aimed to evaluate the possibility of feeding fattening rabbits with a simplified diet composed of only two agro-industrial by-products inexpensive and locally available: brewer’s grain and wheat bran. At weaning (35 days), 68 rabbits were divided into two identical groups (mean weight = 833 g) and housed in individual cages until slaughter (77 days). Each of the two groups (B0 and SF) was fed <em>ad libitum</em> either a commercial pelleted feed (control), or a simplified pelleted  experimental diet "SF" containing 72% wheat bran and 27% brewer’s grain. The feed conversion was within the standards and similar in the two groups (3.55 on average). The growth rate and feed intake of B0 group were 12% higher (P &lt;0.001) than that of the SF group (35.2g <em>vs</em> 31.2 and 128.3 <em>vs </em>113 g/d). The cold carcass yield and the carcass weight were respectively higher (P &lt;0.001) by 4 units and by 9% in the control group. The carcass of SF group was less fatty (perirenal fat: -23%, inguinal fat: -41% and scapular fat:-14%). The economic efficiency was 40% better for SF diet with almost 50 Algerian Dinar more benefit (/kg of meat).</p><p> </p>