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  #1  
Old 02-19-2010, 04:01 PM
KCB615 KCB615 is offline
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Do dogs have navels?

So my daughter is sitting on the floor with my Labrador today. She starts to pet the dog, and the dog rolls over for a belly rub. My daughter, in her 19-month old voice, says "belly" and points to the dog's pink belly. She then lifts her shirt and points to her belly button and says "belly." Smart kid.

Then it hits me. Do dogs have navels? I've never seen something even remotely close to one on my Lab, or any other dog for that matter. Do fetal dogs do the umbilical thing? I mean, otherwise, how would they exchange oxygen and waste(s) with mom. But, with so many in a litter, wouldn't they get twisted around? There must be something, but I've never seen or thought about it before. What goes on with dogs, and where does the umbilical, if there is one, connect?
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  #2  
Old 02-19-2010, 04:07 PM
Terminus Est Terminus Est is offline
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The Perfect Master speaks.
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Old 02-19-2010, 04:32 PM
Omar Little Omar Little is offline
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I don't believe they had umbilical cords attached in their mother's wombs.
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Old 02-19-2010, 04:41 PM
Polycarp Polycarp is offline
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Quote:
Originally Posted by Wilbo523 View Post
I don't believe they had umbilical cords attached in their mother's wombs.
They're placental mammals, so yes, they presumably did.
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Old 02-19-2010, 05:01 PM
SeaDragonTattoo SeaDragonTattoo is offline
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Yes. They're there, they just don't look like ours. It's just a small scar, usually kind of oval-shaped. I work with cats and dogs and as a technician who preps them for surgery I see them all the time. The fur can be in the way unless you've got a short-haired dog with a nearly naked belly!

They definitely are born with umbilical cords. I've cut enough of them to know! They just get tied off with a piece of suture material (if it's being done in a hospital). If they don't get tied off, it's not a big deal. If left to nature, the mother chews off the placenta (and sometimes eats it), and the dangling cord just dried up and falls off within a week. Leaving a tiny scar where the belly button would be.
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Old 02-19-2010, 05:01 PM
Napier Napier is offline
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'Course they do. So do cats. One of our cats has a particularly pronounced one. But the fur helps hide it.
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Old 02-19-2010, 05:05 PM
sheldog sheldog is offline
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Yes they do.. but generally neither an "outty" nor an "inny"...just an oval scar as flat as can be..
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Old 02-19-2010, 06:22 PM
Mk VII Mk VII is offline
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The bitch is supposed to break the membrane, and sever the cord, nibbling it down to a small stump. One of our bitches had a slight hernia here, which you could push back in.
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  #9  
Old 02-19-2010, 07:10 PM
toodlepip toodlepip is offline
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Here ya go!

They don't get tangled for the simple reason that pups aren't floating free in the womb. They each have a separate placenta, attached to the womb a bit like peas in a pod.
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  #10  
Old 02-19-2010, 08:33 PM
njtt njtt is online now
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No. Dogs are created by Dog to be a companion to man (or woman), out of their master's (or mistress') coccyx.
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  #11  
Old 02-19-2010, 09:44 PM
AWB AWB is offline
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Here's a picture of my American Hairless Terrier (Smudge)'s belly, with features labeled. His navel is a slight outie, and only noticeable when his skin is relaxed a bit.

Smudge's Belly
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  #12  
Old 02-20-2010, 02:13 PM
rhubarbarin rhubarbarin is offline
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Yes, they just don't look like ours. My oldest dog has no visible mark in the skin but there is a hole in her muscles - she's always had a small umbilical hernia.

All mammals have umbilical cords.

A dog's uterus is 'horned' or bicornate- it's a long Y rather than a squat pear-shape like ours, and the litter grows one by one down the length of the horns and are birthed in order. All mammals who commonly give birth to multiples have either bicornate, bipartite, or duplex uteri - long and narrower to keep multiple fetuses out of each other's way. We have simplex uteruses, like monkeys and horses. Very much not designed for multiple births, hence all the problems.

Last edited by rhubarbarin; 02-20-2010 at 02:14 PM..
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Old 02-20-2010, 03:37 PM
KCB615 KCB615 is offline
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With your assistance, Halligan's navel was located after a very, very brief search. Right at the northern end of her belly/fur line, just a small, lighter-pink patch about a half-inch long.

Ignorance fought once again. Amazing.

Last edited by KCB615; 02-20-2010 at 03:37 PM..
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  #14  
Old 02-20-2010, 03:57 PM
John Mace John Mace is offline
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Quote:
Originally Posted by rhubarbarin View Post
All mammals have umbilical cords.
Placental mammals. There are many non-placental mammals..

Last edited by John Mace; 02-20-2010 at 03:58 PM..
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Old 02-20-2010, 06:48 PM
Pullet Pullet is offline
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Quote:
Originally Posted by John Mace View Post
Placental mammals. There are many non-placental mammals..
So non-placental mammals don't have an umbilical cord (or something very similar for the purposes of this discussion)? How does the embryo receive nutrition?

Birds have umbilical cords (basically) connecting them to the nutrition in the yolk. They also have navels.

Last edited by Pullet; 02-20-2010 at 06:51 PM..
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  #16  
Old 02-20-2010, 07:03 PM
Johnny L.A. Johnny L.A. is online now
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Do dogs have navels?

Sea-dogs do.
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  #17  
Old 02-20-2010, 09:24 PM
Colibri Colibri is offline
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Quote:
Originally Posted by Pullet View Post
So non-placental mammals don't have an umbilical cord (or something very similar for the purposes of this discussion)? How does the embryo receive nutrition?

Birds have umbilical cords (basically) connecting them to the nutrition in the yolk. They also have navels.
Marsupials actually do have a placenta of sorts, but different from that of placentals. It is formed from the yolk sac, rather than from other fetal membranes as in placentals, and does not persist for very long. Since the placenta is connected to the embryo by an umbilicus, even marsupials have navels.

Last edited by Colibri; 02-20-2010 at 09:26 PM..
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