1. Boy -
YES
2. heavier than tulip she's 2.4 -
yep, twice that
3. two vowels are in their name a e i o u and sometimes Y -
got U & A covered
4. favorite drink is ....water..hehe --
there's something else besides water 
5. likes one or more of the following: bully sticks, yy's, rawhide, diggy kisses, or all natural treats... -
all but rawhide work for Bubba
6. wears larger clothes than tulip..
Yes
I think I mis counted my hints...lol (only have 6)
So does he qualify...
YES!!!!!!!