Usually kidney or liver problems at this age.Why should it be generally acceptable or expected even..... that a relatively young dog is likely to have liver or kidney problems around the age of 7...??
Every living creature is born perfect and Nature has given them all the perfect detoxifying and waste elimination system.... via their liver and kidneys. All the toxins from yearly (unneccessary!) vaccinations....spot on flea treatments...chemical wormers...e-numbers...preservatives...colourings....environmental toxins...household chemicals...all of it has to be processed through the liver and kidneys...
The liver has remarkable powers of rejuvination and regeneration...but...
there is a limit .......to what it can take before things start to go amiss..!
If it were me...I would ask my vet to report a "Suspect Adverse Reaction" form to the vaccine company. (The vaccine company are legally obliged to look into it) If your vet doesn't know what it is...or refuses to believe there is a link..... then you can do it yourself by downloading the form from here...
http://www.alternativevet.org/sarss.htmThen I would seek referral to a Homeopathic Vet....tell him/her that I am concerned about vaccinosis...and seek a natural way to detoxify the body.
I hope he feels better soon x