Interbreeding programme between Miniature Bull Terriers and Bull Terriers

Interbreeding protocol
  • All breeders taking part in this programme will be required to adhere to this protocol as a condition of litter registration, and sign a declaration to this effect
  • Interbred litters will only qualify for registration as Miniature Bull Terriers
  • All participating Miniature Bull Terriers and Bull Terriers will need to have current health certification as listed in (8)
  • Copies of current, clear health certificates, registration certificates and proof of permanent identification of participating animals to be submitted to The Kennel Club’s breeder services manager who will issue an interbreeding pass, valid for six months, and record passes issued and offspring produced
  • The Kennel Club will only register interbred litters where both the dam and the sire hold a current interbreeding pass at the time of mating
  • Progeny of interbreeding can be mated to a Miniature Bull Terrier, other interbred progeny or a Bull Terrier, provided that, in the latter two categories, all animals have met the current interbreeding criteria. The main purpose of the interbreeding programme is to reduce the frequency of PLL in the Miniature Bull Terrier. One generation of interbreeding will not reduce the frequency of the PLL gene sufficiently and whatever reduction is achieved will be quickly diluted out by mating progeny of an interbreed back to Miniature Bull Terriers. Mating progeny of an interbreed to Bull Terriers, and to a lesser extent other interbreed progeny, will achieve a greater reduction in the frequency of the PLL gene
Selection of animals to participate in the programme
It is strongly recommended that older animals are used in the programme wherever possible, subject to The Kennel Club's existing regulations. Identification of the most suitable animal will be generally easier in older animals; their health status will be more apparent and they are more likely to have produced adult offspring. This will give an indication of the overall quality of their offspring with regard to type, and identify those Bull Terriers who are likely to produce offspring of an appropriate size.

Those taking part in the interbreeding programme are reminded that although health screening may identify the presence of certain conditions at the time of testing, it does not guarantee that later onset will not occur.

Animals selected for use in the interbreeding programme must have been examined and passed clear for the following criteria within the previous six months.

Bull Terrier selection

  • Nephropathy: certificate required confirming that the participating animal has a urinary protein:creatinine (UPC) ratio of less than 0.3 within six months of the date of mating
  • Aortic stenosis and mitral displasia: certificate required confirming that the participating animal has a maximum of grade 1/6 heart murmur, tested within six months of mating
  • Deafness: all participating Bull Terriers must have a BAER hearing test to demonstrate that they have bilateral hearing

Miniature Bull Terrier selection

  • Nephropathy: certificate required confirming that the participating animal has a urinary protein:creatinine (UPC) ratio of less than 0.3 within six months of the date of mating
  • Aortic stenosis and mitral displasia: certificate required confirming that the participating animal has a maximum of grade 1/6 heart murmur, tested within six months of mating
  • Primary lens luxation: certificate required confirming that participating animals have been DNA tested clear or a carrier of the disease. Although interbreeding has been specifically introduced to reduce the incidence of primary lens luxation (PLL) within Miniature Bull Terriers, breeders are strongly recommended to be selective in their choice of Bull Terrier, particularly in regard to size and bull terrier type

Agreement

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