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"High white" rats
Ok, I've seen this referenced many many times in reference to higher risk of genetic issues with rats especially. What to be totally honest I can't figure out is exactly what is defined as "high white". I have lots of hoodeds, I also have some with just the dark heads, and quite a few berks with white bellies, but some white going up further than their bellies as well. I also have PEW's, and a couple young ones I'm not sure what they are (maybe straight agouti?) with gray/brown/reddish fur with gray stomachs.
So when do they classify as high white, and do most breeders then cull them out?
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Re: "High white" rats
An easier way to think about it it instead of using "high white" use "strange patterns" for the definers.
The stranger or more unique "special" the pattern the more likely the rats (or its parents) were bred specifically for that pattern...at the risk of everything else (this risk is usually health quality).
These strange patterned rats are also typically higher in white in non-typical locations (head, neck, feet, etc.)
Hope this helps.
Remember there is no guarantee that a low white rat won't carry mega or something else and no guarantee an odd patteren/ high white one will...the risk is just higher.
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Re: "High white" rats
 Originally Posted by lord jackel
An easier way to think about it it instead of using "high white" use "strange patterns" for the definers.
The stranger or more unique "special" the pattern the more likely the rats (or its parents) were bred specifically for that pattern...at the risk of everything else (this risk is usually health quality).
These strange patterned rats are also typically higher in white in non-typical locations (head, neck, feet, etc.)
Hope this helps.
Remember there is no guarantee that a low white rat won't carry mega or something else and no guarantee an odd patteren/ high white one will...the risk is just higher.
Good post! If I were at home, I would post up pictures of my high white rats. Lol, one is a big lap rat, and the other are his mother and sister. All 3 display some very unique and quite beautiful markings, but I had bred before I knew about all the stuff about megacolon.
I know some people here choose to work with some very high white rats, and I'll admit they are very cute!
I can only advocate learning exactly what you have in your colony by line and inbreeding. You'll find issues this way, along with megacolon. Those rats that produced megacolon shouldn't be bred.
High white is mostly dominant, although there are a few different genes to produce different markings. Best way to know is by asking if a certain rat(s) is high white, we do pretty good letting others know what markings and colors they're dealing with.
Now post some pictures!!!  
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Registered User
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Registered User
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Re: "High white" rats
OK, lets see if I can get this. hahaha
First agouti, does look to be just an agouti, although it may be cinnamon. I cant really tell from the picture, but he looks pretty light brown.
The 2 rats in the second picture, the black capped and agouti capped are considered high white, although I do have my own capped female that throws berks and caps consistently and equally. I don't completely consider capped too high white, although some do and should be watched a little more closely.
The litter picture does have an animal with a head spot, stay away from head spots if you can, since they too are produced by the White spotting gene and are considered high white.
The third female is a beige berkshire.
Fourth boy looks to be a fawn self (self= full bodied colored, no white spots)
The last litter pics look good. Just a bunch of hooded black rats. Just that one older female with the head spot.
I personally am not crazy about marked animals and really prefer the solids and low white animals.
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Re: "High white" rats
Oh! I forgot about these 2 posts. These are examples of some very high white rats. Notice in particular the head markings, the blazes, odd-eyed, high white sides.... all high white markings and really should be avoided.
http://ball-pythons.net/forums/showp...6&postcount=27
http://ball-pythons.net/forums/showp...0&postcount=33
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Registered User
Re: "High white" rats
Thanks!
Too bad, I really like the white head markings lol, think it makes them stand out. I guess thats kindof the point though huh. There are 3 I believe, out of that litter of 7 with the head markings, and I think both males (there were only 2) have them.
My hubby is with you though, he prefers the solid colors, darker the better. Still likes the berks though, which is a good thing considering we have a significant amount of black berks as well. 3 out of 4 of the boys we have right now are hooded though, so I think his chances are slim lol. The fawn self is the other boy.
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Re: "High white" rats
Here's a pic of a high white rat with unusual markings. He's a cute little boy, but I haven't decided whether or not to keep him.
Christie
Reptile Geek
Cause when push comes to shove you taste what you're made of
You might bend, till you break cause its all you can take
On your knees you look up decide you've had enough
You get mad you get strong wipe your hands shake it off
Then you Stand
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Re: "High white" rats
Oh my gosh! That little guy is SO cute! Sorta looks like a raccoon or a ferret with that black mask over his eyes!
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