Hi guys, can you pls give me advice on how I can protect the cables in my house from my dog that just loves chewing on them?
The first thing you can do, and won't cost you anything, is move furniture so it's blocking the cables.

If it's not possible to hide all the cables under or behind furniture, then there are channels you should be able to purchase from your local home building store. They are long, 3-sided plastic or metal things that you screw down over the cables.
why don't you train him not to chew on them?