Originally Posted by Bet
Linebreeding and outcrossing...........This is something you and I occasionally talk about.
These are my musings only.....I will be delighted to discuss these issues with other members but I hope that the mention of puppy farm is not going to derail the topic before people have read what I have actually written........
The dogs that are bred by cavalier club members are usually line bred to show winning stock.
Of the UK Cavalier Club 10 top stud dogs last year, the No. one dog sired stud dog numbers 3, 8, 9 and 10.
Stud dog 4 is sire of 5 and 7 ....Number 6 is his grandson and stud dog number 2 was sired by his half brother.
Breeders really do like keeping things in the family.
Show bred puppies make up about one fifth of all litters registered with the Kennel Club.
So, 80% of cavaliers registered are not from cavalier club members and in many cases have very few show bred dogs in their pedigree. There will be some diversity of genes there.
Overall there probably will be more MVD in non-club member dogs as less knowledge of heart problems will mean more young stock with heart murmurs will have been bred, and there is probably going to be more eye, hip and patella problems, but will they be so badly affected with Chiari Malformation and SM?
The latest appalling figures ( 25% SM affected at one year old, 70% affected at 6 years of age ) will be from dogs owned by those who will have found out about the breeders mini scans through their contact with clubs or club breeders
Most non-members dogs have not been scanned. We can have no idea if their results will be as bad.
Don't waste your time getting indignant and accusing me of supporting puppy farmers. There is no way I would pay a penny into their pockets, but I do wish there was a way to scan some of the PF breeding bitches that come into rescue organisations so we could know if these different non-show bloodlines are as severely affected as the show lines, or in fact the different, less closely bred bloodlines have led to a lesser degree of affectedness.
There may be cavaliers out there that could offer some genetic diversity and/or less CMSM without outcrossing to another breed of dog.
The problem would be that while the breeders focus remains firmly set on producing beautiful dogs that win in the show ring ( even if the temperament is so bad they attack the dog next to them ) then they are not going to use non-show lines, however much it could improve the viability of the breed
Cavaliers......Tommy Tuppence 2000-2012 and a half share of Faith.
Japanese Chins.... Dandy, Benny, Bridgette, Hana & Escapologist Fonzi .