Thank you for waiting. Creatine levels are used to determine to what stage kidney disease has advanced. The BUN level and other test results give additional information. Often, an elevated BUN with normal creatine can indicate very early kidney disease. However, BUN levels can be elevated for other reasons. If the dog wasn’t fasted for at least 12 hours before testing, BUN is likely to be high. A dog that has been on a high-protein diet or is slightly dehydrated can also have slightly elevated BUN results. Stress can also contribute. If the BUN levels are below the mid-thirties, with normal creatine, the chances are good that one of these factors is at work.
When BUN lebvels go above 80, it’s cause for concern even with normal creatine. A diet low in phosphorus and protein is usually recommended at that point, but further testing may be necessary. Problems other than kidney disease may be indicated. Thyroid disease is one possibility. Addison’s is another. A BUN over 80 often means a dog has uremia, and would be showing symptoms such as vomiting. Here's a site that tells you how to interpret the blood test used to track kidney disease:
The same page has a list of additional tests that may help narrow down the possibilities for what is wrong with your dog. The site has an excellent page on both conventional and alternative treatment of kidney disease, including diet:
Mary Strauss, who owns the above site is a respected author who writes many articles for The Whole Dog Journal. I think the information on her site will be useful.
It sounds like you are doing well with managing your dog's diet. If you'll let me know what supplements he is on, I can tell you if there are others that may help. If you're interested in consulting a specialist, I can link you to a directory of them.
Finally, there is a Yahoo group for owners of dogs with kidney disease. If you joined it, you could talk to other owners who can tell you what has worked for their dogs, get emotional support from the other owners, and perhaps find others whose dogs have unusual test results similar to yours. I've found such groups to be great resources. This link will take you to the homepage:
If you have further questions, or want any of the additional information I mentioned above, just click on REPLY.
(If you find my answer helpful, please click on ACCEPT. Thank you.)