Thank you for clarifing that. I see the problem and I will see If I can make it more clear that you need to find out what the dogs name is and enter that as the password.
EDITED
OK so I made a few changes, let me now what you think. The note is still hidden but I made the text more clear that it was a password clue and not the actual password. I also renamed the BOWL to DOGBOWL so it is more obvious that it belongs to the dog. I also placed a picture of the dog in the MASTER BEDROOM. This way there are 2 ways to find out the name of the dog. And if you come across the name of the dog before finding the yellow note it is possible that you might guess that that is the password. (Because ppl often have bad passwords.)
(Also I'm glad you liked the TELETEXT inspired title art I made :-)