Check this article, from an experienced research group: Arcego DM, Krolow R, Lampert C, Toniazzo AP, Garcia EDS, Lazzaretti C, Costa G, Scorza C, Dalmaz C. Chronic high-fat diet affects food-motivated behavior and hedonic systems in the nucleus accumbens of male rats. Appetite. 2020 Oct 1;153:104739. doi: 10.1016/j.appet.2020.104739. Epub 2020 May 18. PMID: 32439602.