Grooming in the mouse is stimulated by the dopamine D1 agonist SKF 38393 and by low doses of the D1 antagonist SCH 23390, but is inhibited by dopamine D2 agonists, D2 antagonists and high doses of SCH 23390.

The effects of manipulating dopamine D1 and D2 receptors on grooming was studied in the mouse. SKF 38393 (D1 agonist) and low doses of SCH 23390 (D1 antagonist) promoted grooming activity. SCH 23390 in neuroleptic doses, RU 24213 (D2 agonist), apomorphine and amphetamine (mixed D1/D2 agonists) and haloperidol (D2 antagonist) all suppressed the tendency of normal mice to groom, though probably by different mechanisms. Duration and frequency of grooming could be influenced differentially by these drugs. The findings suggest opposing roles for dopamine D1 and D2 receptors in the expression of grooming in the mouse.