Sucrose preference test was performed to assess hedonic behaviour towards a sweet gustatory stimulus11 (link). Mice were given access to two water bottles (50 ml conical tubes with sipper tops) for 24 h for habituation. Then, one water bottle was exchanged with a bottle containing 1% sucrose (Sigma, S0389) in drinking water. After 24 h, the bottle positions were swapped to prevent position bias. After another 24 h, sucrose preference was assessed as follows (based on weight of bottles): (sucrose (g)/total fluid (g)) × 100%.
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