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Background  Rabbits are also herbivores which efficiently convert fodder to food. They are prolific and converter of plant proteins of little or no use to people as food into high-value animal protein. Rabbit meat is high in protein, low in calories and low in fat and cholesterol contents, being considered as a delicacy and a healthy food product. Feeding rabbits with concentrates is expensive and therefore in order to reduce cost of production, hence the use of rumen content in this study as alternative feedstuff without competition.    Methods  A total of thirty six (36) weaner rabbits  (oryctalagus cuniculus)  of different body weight and age where use in this experiment to determine the effects of replacing rumen content with or without enzyme supplementation for groundnut cake. This feeding trial which lasted for 8 weeks was carried out in order to determine the replacement value of groundnut cake with rumen content with or without enzyme in the diet of weaner rabbit. A 3x2 factorial experiment was adopted such that there where three (3) replacement level of rumen content (0, 25 and 50 %) for groundnut cake by two supplemental level (no enzyme and enzyme supplement).    Results  The results showed that increased inclusion level of rumen content has significant effects ( p  < 0.05) on daily feed intake, rate of weight gain, feed to gain ratio, nitrogen retention, faecal nitrogen, total nitrogen output and nitrogen digestibility. The weight gained by rabbits fed on 0, 25 and 50 % were all comparable ( p  > 0.05) with weight gained value of 7.62,7.44 and 7.36 g respectively. Similarly there was a significant ( p  < 0.05) effect of supplement added on the body weight gain of the experimental animals. There was significant effect ( p  < 0.05) of the diet on the obtained feed to gain ratio. However, there was no significant effect ( p  > 0.05) of the treatment on urinary nitrogen. Significant ( p  < 0.05) effects of supplementation was observed on the feed intake, weight gain, feed to gain ratio, faecal nitrogen, nitrogen retention and nitrogen digestibility but there was no significant effects ( p  > 0.05) of the supplementation on the nitrogen intake. The interaction between the varying levels of rumen content supplementation had significant effects ( p  < 0.05) on the feacal nitrogen, feed intake and feed to gain ratio but no significant ( p  < 0.05) effects on interaction of nitrogen intake.    Conclusion  In conclusion, since the results from this study showed no negative effects on the performance of the experimental animals, the test ingredient can be used as alternative feedstuff at a lower inclusion level so as to reduce production cost and expand rabbit production.

RETRACTED ARTICLE: Effects of replacing groundnut cake with rumen content supplemented with or without enzyme in the diet of weaner rabbits