Lit. "reciting the Buddha's name to a horse", i.e. "preaching to the deaf". Substituted with another English horse idiom that also fits the context.

Don't cry, Rice Shower-san.

I safeguarded your share of the pudding with my dear life.

Do whatever you like... My pudding... is lost...

My Pucchin Pudding... The Glico brand of pudding in prepackaged cups.

Gold Ship-san? What is that stain around your mouth?