There is no way to check right now, but there are warning signs. If it doesn't have the Kalos Pentagon, then it comes from an older game, where it was easy to hack Pokemon. If it has a big series of max IVs, it's probably hacked (ie a 6IV Metagross or a 5IV Latias).
Tufted Titmouse are regulars at backyard bird feeders, especially in winter. They prefer sunflower seeds but will eat suet, peanuts, and other seeds as well. Find out more about what this bird likes to eat and what feeder is best by using the Project FeederWatch Common Feeder Birds bird list.
Once upon a time a dormouse lived in the wood with his mother. The common English dormouse is a most charming little animal, and a great pet with children. The dormouse in its wild state lives on fruits, seeds, nuts and buds. The gardener assured me it was the dormice which eat it all.