skin

I have 4 dogs and one is new to the house.  I notice that they have all developed blotches on the stomachs.  This has not all happened at the same time.  We have a new dog that has been here for 3 weeks and he had a clean nice tummy and now he has blotches on it.  They are not raised or seem to bother him.  They just look like differnt color of skin.  They are mostly gray.

[Aleda M Cheng, D.V.M., C.V.A]

It may be Demodex Mites, Ringworm, or other contagious skin infection.  It would be best to have their skin tested at the vet's.  A skin scraping, fungal culture and sensitivity,  fungassay, or even a skin biopsy may be necessary.