He's castrate, nearly 4 y.o, weights about 4kg(9 lbs), crossbreed of Siberian and unknown dad - very dense and long fur, lives indoor, quite inactive.
I trim him twice a year for almost zero in spring and late summer. The food and water are always there. For time to time I give him some milk, chicken.
The first 3 years of his life he ate varieties of "Royal Canin".
One year ago I switched for "ORIJEN 6 Fresh FISH" and after about 7 months he's got dandruff. On this nutrition he pooped once a day.
I decided to try "Acana Prairie Feast" and he eats it for 2.5 months now, the dandruff is gone, but I also bought him tablets "For skin&coat" so I don't know which has helped. And the pooping, on this nutrition it's twice a day and pretty smelly.