PROPOSED INTERBREEDING PROGRAMME BETWEEN MINIATURE BULL TERRIERS AND BULL TERRIERS.
INTERBREEDING PROTOCOL
protocol as a condition of litter registration, and sign a declaration to this effect.
2. Interbred litters will only qualify for registration as Miniature Bull Terriers.
following criteria:
circumstances may this requirement be waived by the Miniature Bull
Terrier Club (MBTC))
(b) have current health certification as listed in (9).
permanent identification of participating animals to be submitted to the KC Canine Genetics Co-ordinator who will issue an Interbreeding Pass, valid for 6 months, and record passes issued and offspring produced.
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.
must be provided to the Animal Health Trust(AHT) where they will be used to check the authenticity of litters, using DNA profiling. Each blood sample will become the property of the AHT and held by them, possibly for future research.
review, and possible extension, to take place at the end of this initial period.
SELECTION OF ANIMALS TO PARTICIPATE IN THE PROGRAMME.
It is strongly recommended that older animals are used in the programme wherever possible, subject to existing Kennel Club 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.
BULL TERRIER SELECTION
has a urinary protein:creatinine (UPC) ratio of less than 0.3 within 6 months of the date of mating.
the participating animal has a maximum of grade 1/6 heart murmur, tested
within 6 months of mating.
test to demonstrate that they have bilateral hearing.
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.
MINIATURE BULL TERRIERS.
has a urinary protein:creatinine (UPC) ratio of less than 0.3 within 6 months of the date of mating.
the participating animal has a maximum of grade 2/6 heart murmur, tested
within 6 months of mating.
(c) Primary Lens Luxation: certificate required confirming that participating
animals have tested clear on the current BVA/KC/ISDS scheme within 6
months of the date of mating.
Miniature Bull Terrier / Bull Terrier Interbreeding Schedule.
NOTES ON PROCEDURES
a) Copies of registration documents
For Bull Terriers: 1. A urinary protein:creatinine ratio of less than 0.3
2. A grade 0/6 or 1/6 heart murmur
3. Bilateral hearing (hearing test does not need to be within 1 month of interbreeding application)
For Miniature 1. A urinary protein:creatinine ratio of less than 0.3
Bull Terriers: 2. A grade 0/6, 1/6 or 2/6 heart murmur
3. Eyes clear of primary lens luxation (certified within previous 6 months)
Miniature Bull Terrier / Bull Terrier Interbreeding
DECLARATION
Name of dog/bitch*: ………………………………………………………………………
KC Registration Number: ………………………………………………………………..
Name(s) of owner(s): ……………………………………………………………………...
………………………………………………………………………
Contact telephone no:……………………………………………………………………..
(Note: if a dog or bitch has more than one owner, all owners are required to sign the declaration below)
Signature:………………………………………… Date: ………………………………
Signature:………………………………………… Date: ………………………………
* Delete as appropriate
Please return this signed declaration to: Dr Jeff Sampson, Animal Health Trust, Lanwades Park, Newmarket, Suffolk, CB8 7UU
ADDENDUM
The attached protocol for the interbreeding programme between Miniature Bull Terriers and Bull Terriers has one important amendment from the version originally circulated at the MBTC AGM and reported in the Dog press. Following release of this initial version, several comments were returned. One in particular came from a research student in Australia who has been studying renal and cardiac problems in Miniature and Bull Terriers for three years. As a result of her observations the required urinary protein:creatinine (UPC) ratio has been lowered from 1.0 to 0.3. All other aspects of the protocol remain unaltered.