As I was not personally involved in this and only relating the information, You may be best contacting the vets at Swanbridge, or the actual breeder involved in this, their details are below, they should be able to provide you with all the technical information as it was they were the vets involved. hope this helps.
Swanbridge Veterinary Hospital
Tranby Lane
Swanland
HU14 3NG
T: 01482 633888
F: 01482 634576
mailto:info@swanbridgevets.com
breeder
Anne Marie Brannon
Telephone: 07768965304
Lincolnshire
Barton-upon-Humber
or go to her champdog page where there is a contact via email.
Castlestaff
Mo