The transformation of canola oil (CO), chicken fat (CF) and used cooking oil (UCO) esters is highlighted with the greener approach of microwave-assisted solvent-less ethenolysis. Four different catalysts were screened to carry out rapid reaction at low-temperature in short time span (50 °C and 30 min) and the study demonstrated significant improvements in turnover numbers (TONs) to 92,000 and 78,080 for CO esters and UCO esters respectively, indicating the possibility of convenient scale-up without the requirement for extensive purification of catalysts and starting substrates. A novel renewable lipidic source of spent hen for ethenolysis is exploited for the first time and maximum turnover numbers of 21,820 was achieved through optimization of catalyst/feedstock system.