The shocked dad of two - who sent an apology to other parents - said: "I was totally perplexed as to how he could have made up his own words to the song, especially using f***. Then I sat with him as he played with the dog and was horrified. I guess it's supposed to sing, 'Bark with me', but it definitely sounds like f***, not bark."
John, of Southampton, had his worst fears confirmed when he played the tune to pals. Now Leap-Frog, the US-based maker of the £19.99 cuddly toy, is to change the song after a number of complaints from him and other parents.
A spokesman said: "We take great care when designing our toys.
"But we have recently heard from a handful of UK customers that, apparently due to our voice actor's under-articulation of a word, a youngster could instead interpret this to be a common curse word.
"We're working on recording a replacement phrase that will eliminate any misinterpretation."
Euan Stretch, Winnipeg Free Press