Hi. My brother and I got standard poodle puppies from the same litter. Mine is scheduled for his first grooming now that he’s 16 weeks old and has his vaccinations. I wanted to have him trimmed kind of short because he plays on our farm and gets filthy, with little green burrs stuck all over him!! My brother heard that you shouldn’t trim them short until their adult coat comes in. Is that true? I don’t want to mess up his future coat by cutting it now. I’m a first time poodle mom. Thank you for your advice!!