Don't say it, spell it

Riggs is by no means dumb.  He understands several words and phrases and you will get an immediate reaction out of him.  So certain words and phrases have to be spelled out instead of said.

Current list of words that must be spelled and not said:

• T R E A T
• R I D E
• C A R R O T
• P A R K
• WALK
• G & G (Grandma & Grandpa)

He also understands some phrases such as:

• "Do you want something?"
• "Mama's home" or "Dada's home"
• "Do you want to go for a..."
• "Do you want to go to the..." 
• "Where is your bone?"
• "Where is *insert stuffed animal name here*?"