I came across The Giggler Treatment by Roddy Doyle 

when I worked at Anderson’s Bookshop in the kids’ section. You probably think that I love anything that has the topics of “poop" and “fart.” Now you can add to my quirks that I find hilarious anything with a dog using the toilet (not as a drinking fountain). I read it to 2 kids who collectively have an attention span of three minutes,unless,of course, they are laughing hysterically. (For reluctant readers and listeners, age 4-11)