Complex sentence: However, some sources suggest that a consignment of birds from China around 1835 were given to Queen Victoria, assuming the name of'Shanghais' and that these birds were bred with further imports and were developed into the breed we know today as the Cochin.
Split into simpler sentences: However, some sources state that a consignment of birds from China around 1835 were given to Queen Victoria and assumed the name of'Shanghais'. These birds were bred with further imports and were developed into the breed we know today as the Cochin.