Why is my dog's fur falling out in chunks and changing color?

It may be due to true skin problems like allergy or skin infection. However, if she doesn't show excessive skin itchiness or redness she may have hormonal problems (diabetes, underactive thyroid gland, overactive adrenal gland etc). You shoud get her checked by your vets. They are likely to recommend skin testing and blood test to find out what is going on.

Smokey could definitely be experiencing some changes to his coat due to growth. I would certainly suspect this particularly if he is not having any sort of itchiness. Thyroid disease is common in dogs, but very uncommon in younger pups. I don't believe I have ever seen a hypothyroid dog under the age of 6 or 7 years. Sunbleaching can happen but it wouldn't cause actual loss of hair. Hair loss in absence of itching is typically due to something like you have described, an endocrine condition, or some sort of immune mediated condition. As long as the hair loss hasn't been spreading considerably and there are no other clinical signs of illness, I would continue to monitor the situation carefully for a few more days before going to the vet. If there is itchiness associated with the problem, Smokey will likely require some therapy in the form of both topical and systemic drugs. Hope this helps. Let me know if there is anything else I can do to help.

This could indicate an allergy to the environment, food or another skin disease like sabeceous adenititis or an autoimmune disease. Sometimes an oatmeal based pet shampoo and conditioner help as well as omega 3 fatty acid supplements. However if this is due to an allergy he may need a long term medication like Apoquel for control. If Shadow gets worse, or the over the counter treatments don't work, he needs to get checked out by his veterinarian.

If there are bald spots left behind when you pull the fur out it is possible that Autumn has a skin infection, allergies, or a hormonal disease like hypothyroidism. If there are no bald spots this could simply be excessive shedding and not related to any medical problem. I wouldn't expect this to occur secondary to cancer unless she also had significant hair loss and skin lesions. If her skin does not look normal or she is itchy I would recommend having your vet examine her.

Mila's signs could be indicating allergies as well as a skin infection. The skin color changes could be due to this being an ongoing/chronic issue. Sometimes an oatmeal based shampoo helps as well as omega3 fatty acid supplements but if your dog has allergies your veterinarian can discuss long-term control plans with you.

The redness and hairloss on Charlie could be several things including allergies, skin mites, flea bites, ringworm (which humans can get) or a bacterial infection. You can try adding in an omega 3 fatty acid supplement for dogs, this can help improve the skin health. You may also try changing his diet to something like Royal Canin or Nutro as they are aimed at skin health. You can wash the lesions with soap once a day and rinse well (don't wash his whole body, just those spots). Protect the areas from licking or scratching. If they don't start looking better within about a week or if they get worse, have him examined by his veterinarian who may prescribe medications. Best of luck and please feel free to post any additional questions.

Shedding excessively can have many reasons: 1) change of seasons...your dog sheds his summer hair to get a winter coat (this will depend on your climate) 2) food quality is not adequate 3) ectoparasites such as mange mites, demodex mites, fleas, ticks, etc. itch and the dog scratches excessively and loses a lot of hair 4) some dogs naturally shed more than others. 5) hormonal changes, e.g. your dog comes into heat. Females will shed their hair coat You can do the following: 1) feed a good quality complete commercial puppy food for large dogs 2) Check for ectoparasites and treat for them if present 3) Brush or comb your dog every day This should minimize the shedding.