WHY COULDN'T THE HORSES GO TO THE COUNTRY?
That's one thing I never got in either the movie or novel. When BB's first owners have to move to the countryside because of his mistress' declining health on doctor's orders, why couldn't the family keep their horses and how were they suppose to get around without them, considering this was the 1880's before cars were invented? Jerry Barker is also sent to the same place, following a bout of pneumonia that nearly took his life, on doctor's orders after being he told he could never drive a cab again, which results in BB being sold for the same reason yet again.
And what happened to Birtwick Park after the family moved to the countryside? Was it still their property (the countryside being only a temporary place of rest until the mistress got her bearings when her health permitted) or was it sold to somebody else and the family's stay in the countryside's indefinite?