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04-07-2007, 07:21 PM | #1 |
Donating YT Addict Join Date: Mar 2007 Location: Palmetto, Fl
Posts: 293
| Brown eyes, blue eyes?? I can't seem to find the info I am looking for. I know I have seen little bits mentioned about what color a yorkies eyes shine, and how that affects their coat....i think Anyway, is it true that if their eyes shine blue or green they will be have nice coat? And what do brown eyes mean? Or.....any I just thinking that I read this and have no idea what I am talking about Anybody want to clear this eye thing up for me?
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04-07-2007, 07:33 PM | #2 |
Peeka Boo I See You! Donating Member | When you take his pic if his eyes glow green it's supposed to mean he will be silky if they are red,yellow or other he will be cottony .. or so it's said lol hopw this helps
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04-07-2007, 07:35 PM | #3 | |
Donating YT Addict Join Date: Mar 2007 Location: Palmetto, Fl
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It is more of an "old wives tail" or is it true?
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04-07-2007, 07:56 PM | #4 |
Peeka Boo I See You! Donating Member | It's like the growth chart sometimes it's true other times it's not. Peeka's eyes alway glow green he he has a soft coat it isn't super silky but it is soft
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04-07-2007, 08:42 PM | #5 |
No Longer A Member Join Date: Oct 2006 Location: The Big Friendly City :)
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| I agree, I think it's true for some yorkies and for others it's not. Jaden and Jewelina both have 100% silk coats and their eyes normally reflect green or blue, never red or yellow. I'm sure, like with everything though there are some exceptions to the rule... |
04-08-2007, 03:50 AM | #6 |
Donating YT 1000 Club Member Join Date: Jul 2006 Location: Kearny, NJ
Posts: 1,183
| There might be some truth in it, Pepper's eyes never shone red or yellow, blue as a pup, then green. He's not true silly though, more soft and silky...
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04-08-2007, 04:42 AM | #7 | |
Mardelin Yorkshire Terriers Donating Member Join Date: Aug 2006 Location: California
Posts: 14,776
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The eye in all animals except pigs and man have a reflective layer along the back of the retina called the tapetum. This layer serves to reflect light to allow maximal usage of the available light. In some animals the tapetum is colored in others it is not. The reddish color that you see in human eyes is the reflection of the blood vessels in the back of the eye because the tapetum is NOT colored. This is the same in the "red eye" of the Yorkie. The blue and green you see in the Yorkie's are from a pigmentation in the tapetum -- how this relates to coats I am not sure.....but could be that pigmentation of the eye and coat texture are related genetically. Tapetums are very beautiful -- metallic, brilliant colors in most animals. You can watch Yorkies, clipped down or in full coat, outside in the sunshine ... and you can easily separate them into two groups - those with a "blue cast" to the coat, and those with a "gold cast" to the coat. Those with gold or bronze cast to the coat have eyes that reflect a flash bulb or flashlight with the "red eye" or "shiny" red reflection to the pupil.......no pigment. Those blue cast dogs always seem to reflect blue or green from the pupil.....pigment. The "red eye" dog has a thicker, softer, more opaque (not shiny silky) coat ... silky coated pups look kind of straggly. What is going on is that those with the gold/bronze cast has LESS eumelanin (black) and more phaomelanin (yellow). Typically phaomelanin (yellow) does NOT get put in the tapetum. So NO tapetal pigment results in red color from the blood vessels. Whereas the blue cast dogs have more eumelanin resulting in a pigmented tapetum and the reflection that you see is bluish or green. It's very similar in chocolate and black Labs-- chocolate labs tend to have pale gold or red tapetums while the black labs have brilliant green and blue tapetums. Again it has to do with overall production of melanin (pigment) and where it is put. It also has to do with whether the dog carries the genes for true blue, clerical blue or black AND whether they also carry the gene for progressive graying (delute). That is my explaination I have learned from study of the breed and genes and pigment. Is it any wonder that Yorkies are difficult to breed to the standard
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04-08-2007, 05:28 AM | #8 |
Donating YT Addict Join Date: Mar 2007 Location: Palmetto, Fl
Posts: 293
| Mardelin, seriously, you are amazing. Everytime I read one of your posts, I am more and more in awe of your knowledge. I would seriously love to just sit with you and soak up some of that knowledge on this breed. Thank you for clearing up a couple things for me. Percys coat actually shines gold, even though he is black/blue. So I have been wondering about that also.
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04-08-2007, 05:38 AM | #9 |
Donating YT 2000 Club Member Join Date: Oct 2006 Location: FL
Posts: 7,651
| Mardelin -- Thanks for that great explanation! I have started reading some of the genetics and gotten lost before the end of a paragraph. You made it easy to undersand, while leaving us with the idea there is still more to the story. I have a question -- do you know if silky coat or soft coat are dominant? If a silky and soft coat mate -- chances of silky coat pups?
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04-08-2007, 05:38 AM | #10 | |
Mardelin Yorkshire Terriers Donating Member Join Date: Aug 2006 Location: California
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04-08-2007, 05:47 AM | #11 | |
Mardelin Yorkshire Terriers Donating Member Join Date: Aug 2006 Location: California
Posts: 14,776
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I've yet to get a handle on this as I have not breed anything but silk to silk (and so far have produced nothing but silk) and I need to do some more studying....I've witnessed 2 silks produce a soft coat (but, more often than not this breeding will produce silk) and I've witnessed one soft and one silk, produce an all silk litter. I've been told that breeding a silk dog with a soft coated bitch will produce silks ( as the male is dominant usually done to bring in color being blue is a diluting gene).
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