why does it say my pet has a cone on his head?

@MalteseGirl5 Another helper has used this mod before for their pets and he loaded that game and confirmed that he also sees the same options you do - including the greyed out option.

He said the author has posted that these types of issues are a known problem at this time with the mod and are caused by the fact that pets are not meant to be controlled in the game. Weird part is that in his game when he removes the mod the options when clicking on the dog-bed go back to the normal options. So the mod seems to successfully remove in his game - unlike when you removed the mod in your game and the options remained.

It seems that if you're willing to ignore the greyed out option on the beds, as long as there's not any other issue being caused by the mod in the game, this is a minor price to pay if you love the mod. Please look up the information posted by the mod creator, though, and keep an eye on the mod. Since you know it's already having some amount of issue in the game, if any other issues arise it would be good to check if the mod caused it - and to monitor the information the author posts. Perhaps you'll be lucky and they'll manage to make a successful update. (Thanks @jpkarlsen 🍺!)