Are you English? sometimes a small room can look bigger with all over pattern, say a toile or a floral,,repeat it on the walls, either upholster the walls and use it for drapes, or use the same pattern in a paper as in fabric. It will cozy up the room, and hide any quirks in the architecture. To put a small shade on the window is to draw attention to it and the fact that your bed is offside. Keep the bed it sounds nice. A small room like that wrapped in pattern is a delight I think.

DO NOT USE DRUNK TANK PINK FOR A ROOM! Sorry, Groveraxle, but further down in the site you linked to it said, "Prisoners did respond and calmed down, as hoped, initially. Major goof: If they hung around too long, they became even more violent." Some police depts. have a pink room, but are cautioned not to let anyone remain in it more than 1 hour. It's called the rebound effect. I read about this while working for a state police agency.

Wood and dogs are never a good combo I have slate look and feel laminate which has withstood 7 yrs of 2 big goldies with not one scratch and grandkids in and out of the pool.

If the grout was supposed to be white but has come out grey then there is either an issue with the grout or this is as I described before. I certainly wouldn't use a grout pen until you have looked at cleaning the residue from it. If this is polymer residue then the grout pen would only stick to this so would probably wear off and become patchy. If there is an issue with the grout then you should speak to the manufacturer, this does happen on occasions and they will check it if they are a reputable company. Who was the grout manufacturer? Email Ceramica is the group of companies which Viva belongs to. So I suspect that this is the tile I mentioned. I know the tile as we sell it, the tile is very good quality. Speaking as a tiler with 18 years experience if the grout was grey and has come out white then it can only be the issues I have described. Cleaning should definitely be your first option.