Cotton wool coat

I have a three-year-old neutered Golden Retriever.
Even though he is fed a good diet, his coat is like cotton wool!
I wondered if anyone could suggest anything to make it more silky and shiny - but not too high in calories as that is an issue also!

Thanks

Wendy, via email 

Splitting hairs

My non-shedding fluffball gets the occasional mat in the usual places - back end, tummy, armpits, ears. What's the best way to remove?

Combing them out is time-consuming and pulls on the hair, even if I hold the mat. Someone mentioned a mat splitter to me. I googled it and it looked like a torture device. How do you use it safely?

Any other ideas on mat removal, please?

Georgina Kay, by email