Considering the number of doodles vs poodles, I'm surprised to hear that your vet hadn't seen this in a cross before. Poodles can have an injury (bite, sting, cut, etc) response where the affected area will revert back to the color and texture of when they were puppies but does grow back eventually to the adult color and texture without any medical intervention. This will happen anywhere on the body that the injury was sustained.Vet hadn’t come across this in a goldendoodle but has seen in poodles
I just cam across this thread and glad I did because my 2 year old Goldendoodle just starting showing the same issues on her back after a grooming. Much like both of your dogs, myThe vet said we could actually biopsy the area and they can confirm if it is this or that. It is light sedation and a few stitches . I will tell you what the dermatologist says when I go. I am just worried it is some deeper issue .. an endocrine or hormone problem. Did you do lab work? Many times hair issues with dogs (like humans) can be deeper things so I want to rule out any auto immune disease that may be rearing it’s head. She did have elevated Triglycerides and cholesterol which they said was because she ate breakfast that morning… But increases in those two items are also the beginnings of Cushing’s disease which also impacts the color of hair… Extra panting… Excessive thirst… Bloating. I doubt it is any of that but I absolutely want to rule out those as well. I have a friend whose dog had Cushing’s and their vet missed it the first time around delaying treatment. To be continued.
2 Week update on our Murphy
Vet Visit -- Our vet did a ANTECH - Thyroid Profile 2 panel to rule out hypothyroidism. Everything came back within normal ranges. We started Murphy on daily regiment of Zyrtec. So far no change to the hair along his back. The darker/coarser hair is not spreading, just getting longer like the rest of his hair. We will continue on Zyrtec and keep an eye on it for worsening symptoms such as oily skin or bald spots which could point to sebaceous adenitis. If this happens, vet will do a biopsy first to confirm before treatment.
Discussion with Breeder -- I reached out to our breeder who has full (and clear) genetic panels on both of Murphy's parents. She said she has seen this happen when a dog is injured or has a hot spot and hair comes back darker. She is also aware of many forums like this one where possible causes such as topical flea meds have been discussed but no definitive diagnosis has been reached.
In short, the mystery continues.
So we have done biopsies and bloodwork to rule out endocrine issues as well as SA. Today we finally made it to a dermatologist for dogs and they concluded that this is fairly common in poodles and mixed poodle breeds… Where they have extremely sensitive hair follicles. This could’ve happened after a grooming incident or something like that which we will never truly know but because they Don’t shed it could be a year and a half before the hair ever grows back. But no overall health concerns.The posts on the Doodlekisses site go back as far as 2013, iirc. No one seems to have gotten any diagnosis from the medical community.
Because of this, I'm bumping to ask again
have any of you contacted your breeder to ask
1/ if they might happen to know what this is
2/ if they have any dogs that have had this
3/ if any other owners of any other pups from the litter yours came from have contacted them about this
Another possibility might be to do some DNA testing.
I'd start with the breeder first, tho, just to see if anyone gets an answer and particularly if more than one of you gets the same answer.
Given that there seems to be more of you than coincidence alone could account for, it seems very likely that a forthcoming breeder will know or at least have seen this condition before. The very specific nature of it and what appears to be the prevalence in Goldendoodles yells to me that someone breeding them must know something helpful.
If we had this many members with purebred poodles showing this condition, we'd be checking with the breeder for the reasons noted above. They'd want to know of this. They might know what it is,
I truly believe that someone who is as close as a breeder is to seeing litter after litter thru the years, and hopefully stays in contact with the pups owners will have seen this condition and know what it is and what causes it.
goldendoodle discolored fur on spine - Google Search
]We are going through the exact same thing! Vet did a test for Hypothyroidism but came back negative. They recommended we come back in a month for a biopsy. Vet hadn’t come across this in a goldendoodle but has seen in poodles. Will keep folks updated as we learn more. Curious to hear others progress as well.