The elevation of ALT levels in the deficient Najdi lambs was also noticeable and it could reflect one or more illness including muscle and skeletal damages (Altug et al., 2006; Pugh & Baird, 2012; Amanoel et al., 2016; Uyar et al., 2017), acute and chronic liver disorders (Hrkovic-Porobija et al., 2017; Porobija et al., 2018), and liver flukes infestation (Denizhan et al., 2019; Khan et al., 2019). Here, GPT is linked to fascioliasis.