There are a number of possible causes. Probably the most common would be Demodex also called "puppy mange." It is caused by a mite that commonly lives on dogs without causing any problems. However, in puppies, with incompletely developed immune systems they can cause problems.
The pup usually presents with small bald patches around the eyes and mouth. Medicated creams can be used to treat localized reactions and the pup's own immune system usually kicks in to deal with the problem in the end.
If the problem spreads to other areas of the body or lasts more than a couple of weeks the problem may be a more serious form of mange.
There are, of course, many other possible causes, including Allergies, ringworm, and parasites among others. Demodex is just the most common. Only a veterinarian can diagnose what a specific puppy's problem is and prescribe the appropriate treatment.
fleas
lots
First of all don't let your dog play with a sick dog. Tell the owner of the sick dog to take it into a Veterinarian. If your dog is losing large amounts of hair or has bald spots on his coat, take him into your Veterinarian to be checked out for such things as demodex or sarcoptic mange mites or other issues. Losing small amounts of hair is normal as they are shedding. Make sure you have your dog on a good brand name of dog food.
Is you dog showing signs of a pot belly or eating more than usual? Losing hair is a sign of cushings disease
No! Other than a hair transplant there is nothing on the market that will make your hair grow. If you are losing hair (a guy) then get it cut in a nice style (shorter) go to a hairstylist (lots of guys go.) Longer hair makes the hair look thinner when you're losing hair.
I used Epi-Smoothe on my dog. She has some spots where her fur is falling out
A dog's hair changes color over time due to a natural process called graying, which is caused by a decrease in pigment-producing cells in the hair follicles as the dog ages. This results in the hair gradually losing its original color and turning gray or white.
Hair loss on a dog's feet can be caused by various reasons, including allergies, infections, parasites, or autoimmune diseases. It is important to consult a veterinarian to determine the specific cause and appropriate treatment for your dog's condition.
Look up Mange... and consult a Veterinarian.
It kepps you from losing your hair most of the time but some side effect are losing of hair.
There are many reasons that your dog is having diarrhea and losing hair. Take your dog into your Veterinarian to have a check up. Bring in a small sample of your pet's feces too so the Vet can check it for internal parasites or signs of blood. Don't try to diagnose your dog yourself, take to your Vet. Make sure you are feeding your dog a good name dog food and not some cheap store brand food.
If a dog (any dog) is losing hair in big enough patches to see his bare skin where he has lost it, he probably has mange, and should be seen by a vet. There are other causes too,but mange is the first thing the vet will suspect. Take him to the vet.