Why is my 4-year-old Lab not eating with black spots on her gums?

Some dogs will lick excessively if they are nauseous. If your dog is vomiting or not eating well, this is likely the case. They will also lick or smack their lips if there is a bad taste in their mouth (ie. after giving a medication). Other dogs can lick as a nervous habit. If it persists, I would have your dog evaluated by his veterinarian and to make sure the black spot in the mouth is his normal pigmentation.

She is very cute! If she has had the dark spots for 8 years and they haven't changed then it is likely just normal pigmentation. She could be slowing down with age and may have a harder time after exercise, but if it gets worse then she really should be evaluated by a vet for a chest x-ray to make sure she doesn't have heart or lung disease.

This could be normal pigmentation in the gums. You can keep an eye on it now that your are brushing Snoopy's teeth daily. If it begins to grow or change rapidly, then he should be seen by your veterinarian.

Poor Chloe! If her tongue and gums look white instead of pink, this is a medical emergency - she needs to be seen by a vet right away. This can be caused by internal bleeding, heart failure, or severe shock. The red spots on her body could be related to a bleeding disorder, or could be unrelated. The emergency vet can do blood work to help determine what's wrong and get her started on appropriate treatment right away.

I'm wondering if you intended to attach a picture - if not, attaching a picture could help us determine what these might be. If they are flat they could be normal areas of pigment, and sometimes dogs will start to have more patches of pigment on their skin and mucous membranes as they age. If they look more red or purple bruising is possible which would be a concern - if you think this might be bruising you should see a vet right away since it could be a sign of a bleeding disorder. If they are raised then they could be oral growths or tumors and you should have a vet take a look.

Oh dear! If Spike won't eat anything except fruits and is also acting lethargic (sleeping all the time), this is not normal - most Labs this age are very high energy and are always running and wanting to play. The dermatitis may be related to the same underlying illness, or could be a separate problem. I would recommend taking him to the vet as soon as you are able to - he/she can do blood work or other diagnostic testing if needed to help determine the problem and get him started on appropriate treatment.

I would recommend getting your vet to check this closely, it appears in the pictures that the lower canine is making contact with the gum and chronic irritation can cause inflammation, scarring and occasionally tumour changes