Laboratory experiments were carried out to clear the possibility of using some expired vegetable oils in rodent baits instead of using the non-expired ones or getting red of them. The obtained data proved that the highest average of bait consumption by Mus musculus per day was recorded at 0.25% for all the tested oils (Lettuce, olive, sesame and cotton seed oils). The variations in consumption especially between 0.25% concent-ration and the remaining concent-rations were noticeable. Results proved also that lettuce, olive and sesame oils were more palatable to the mice at 0.25% concentration. Moreover, olive oil and sesame oil baits were more palatable to M. musculus than lettuce oil and cotton seeds oil both. On the other hand, Rattus norvegicus accepted the lowest concentration (0.25%) more than the others, (0.50%, 0.75% and 1% concentration) for olive oil and cotton seeds oil. Meanwhile the Norway rat accepted the lettuce oil at 0.75% concentration and sesame oil at 0.5% concentration more than the other concentrations. As well as, the results assured that palatability of the Norway rat was parallel to their bait consumption for the whole experimented oils. Finally, the whole results confirmed that baits of the expired oils; lettuce, olive and sesame oils at either 0.25% or 0.5% concentrations increased consum-ption of mice and rats more than same concentrations of cotton seeds oil (The recommended one).