is it the 10 week old whippet pup you are talking about ,whippets are known to have retained testicles but at 10 weeks old ,they seem to go up and down like yoyos lol ,its almost like someones" grabbing my balls again" and they suck them in , mind you id rather take it back ,run it on a bit longer and sell it on to a nicer person ,its not like you deliberately sold her a knacker