What Breed Is My Dog?

This is Trixie! She has been part of our family for only 5 days. She is super sweet and only wants to please, we love her so much already. She is 9 months old. The shelter said she was a Beagle/Retriever X. I have taken her out to socialize a lot already and many people have asked if she has Pit Bull in her. Regardless of what she is we will love her. I just want to know so I can do the best for her. What breed do you think she is?