Hi Mercedes,
I would have to completely disagree with the breeder who said Field Spaniels are not good with children. I can't understand where people come up with these ideas. Field Spaniels are FANTASTIC with children. They bond very closely with children and are very tolerant with them and love their company. We have 7 Field Spaniels and have two children and they all get on fantastically well. In fact, we prefer placing our puppies into homes with children as we feel that they have a special bond with the kids and become very nurturing of the kids. Remember that the temperament breed standard for a Field Spaniel open with the words "unusually docile" meaning that they are exceptionally friendly - which they are.
I appreciate that they can be very difficult to obtain - but don't eliminate them from your options. They are very much worth waiting for.