Friday, July 11, 2014
Years ago an ad appeared in a newspaper in Nebraska offering “rare golden Dalmatians” for sale. We chuckled over that one and wondered if the litter owner didn’t realize he had lemon-spotted pups, or if he was just using it as a marketing tactic.
Lemon-spotted Dals were never very common until a lemon-producing English import Dal was used quite a lot, and suddenly lemon pups were showing up in well-bred litters. The puppy on the right goes back to that dog, and is linebred on him. There were always a few kennels in other parts of the country that got lemons too, but in the 1980s, during the Dalmatian popularity boom, suddenly there were LOTS of pet-bred lemon Dals showing up. Some of the bloodlines commonly seen in puppy mills carried the recessive gene for lemon, and puppy mills often breed together closely related dogs. Doubling up on a less common recessive gene makes it a lot more common. If a dog inherits one copy of the recessive gene, he “carries” the recessive trait and can pass it on. If he inherits two copies of the gene (one from each parent) he displays the recessive trait.
There are several gene loci that affect the color of the Dalmatian markings. To make it as simple as possible, the ones we are concerned about here are B/b (considering B is black and b is brown or liver, with bb liver being recessive) and E/e called extention. EE or Ee means the dark pigment (black or brown) will be present, while ee means the dog will have no dark pigment and will instead be yellow or orange which is the recessive color. The E/e gene does not affect the nose and rim pigment, so the lemon or orange dogs who inherited the ee combination will still have either black or brown noses and eye rims. So a dog who is BBee will be a black-nosed lemon, while a bbee will be a liver-nosed lemon. A dog that is BbEe will appear to be a normal black spotted Dalmatian, but will be able to produce both livers and lemons, depending on how it is bred – remember the dogs need two "b"s to be liver and two "e"s to be lemon. In some breeds such as Pointers where this color is accepted in the breed standard, the dogs are divided into lemons and oranges, depending on the color of their rims and noses. In Dals we generally refer to all ee dogs as lemon.
We’ve never had a lemon puppy born here, and have only occasionally used lines that are known to produce lemons. Because lemons are not common in the lines we are involved with, we don’t even think about when planning a breeding. However, when a litter brother to Fern’s sire produced lemon pups we knew where in his pedigree it would have come from. Because Fern’s sire could also have inherited that e gene, it could have been passed on to her as well. There is a simple DNA color test available for Dals that will show whether the dog carries lemon or liver, although in Fern’s case we know she carried liver because her dam IS liver. We can also test Dals for brindle, tri-color and for long coats if we are concerned. I decided to do the lemon test on Fern and she came back EE – she does not carry the e that can produce lemon.
Although I choose not to breed lemons, tri-colors and long coated Dals, I've seen some lovely dogs that inherited those traits. No, I don't think we should change the standard to make them acceptable for showing, but I do think it's fine that they occur in the breed, and I've seen some lovely ones. I'm also glad that we have DNA tests available that allow us to check out our own dogs before we breed them and not be surprised when they show up!
Thursday, July 10, 2014
|Hopefully Fern is thinking about puppies|
We'll know pretty soon if we have "buns in the oven" (slang for being pregnant). Fern's pups are due about August 25th +/- 2 days. That's how it's listed on the litter chart our clinic provides when you do progesterone testing and they tell you the right days to breed. According to the tests Fern probably ovulated on a Saturday, and because eggs need to ripen for two or three days before they can be fertilized her best days for breeding were Monday and Wednesday. That was a couple days earlier than I would have tried had I not done progesterone testing. Because this was a first breeding for both Duncan and Fern, I wanted to maximize my chances of hitting the right days, without relying exclusively on just the dogs' behaviors. Both dogs were most cooperative and breeding went smoothly.
Everything has fallen into place so far. Fern waited to come in season until AFTER she turned 24 months, so we were able to get her hip x-rays done and sent off to OFA for evaluation (we did her elbows at that time too). X-rays looked good or excellent, so we knew she'd be given a passing score which of course she did. All other health testing had already been completed, and Fern now has her CHIC number - a requirement for us. OFA Good hips, BAER bilateral hearing, and OFA normal elbows, eyes, and thyroid. Fern is also entered into the complete dentition database. Duncan also has his CHIC number and the same test results except for having OFA Excellent hips.
We could take Fern in for an ultrasound about day 25 to determine whether or not she is pregnant, but I can also palpate her and tell that. Ultrasounds are invariably wrong as far as number of pups, so simply knowing she is pregnant by palpation is a more sensible choice for me. Saves a trip to the vet clinic, and a few dollars that I don't need to spend. Because I just spent almost $1,000.00 for health testing, a blood panel, and progesterone testing, we'll save the cost of an ultrasound - there will be lots of other ways to spend that money!