Coach Dave Kemp told BBC Radio Stoke: "We're looking to see how he can fit in. It doesn't mean a signing is imminent, it's a chance to have a look.
"He's got some power, got some pace, he can score, but that's a long way from us signing him, we haven't even discussed it yet."
Bunbury made his international debut against South Africa last month, and was playing in a youth tournament in Spain when he was invited to train with the Potters last week.
The former Canada Under-20 international scored five goals in 26 appearances last season for his club side, then called Kansas City Wizards.
Source: BBC Sport
Source: BBC Sport