"Are the big dogs mine?"
Translation:Jsou ti velcí psi moji?
It is actually possible. Most likely when you ask which dogs from several groups of dogs are yours.
Jsou moji ti VELCÍ psi? Are the BIG dogs mine?
Or when you ask whether the big dogs are the thing that belongs to you as other things around go to someone else.
Are the BIG DOGS mine? Jsou moji ti velcí psi? (Are the big dogs the thing that was selected for me?)
If you just whether the big dogs are yours or not it is better to put moji at the end. It would also be possible with tour order, but only with a special intonation.