What's causing a new patch of missing fur on my dog's back leg?

This bald patch on Moo Moo could be caused by trauma, or her pulling the hair out of that area due to itchiness. Itching in cats could be due to fleas, mites, allergies, or ringworm. I would keep an eye on the spot for now. If the hair doesn't grow back, or the spot gets bigger, then I would take Moo Moo into the vet for an exam to rule to one of the causes of itchiness I mentioned above.

From the photos here it looks like these are patches of hair loss. We can have hair loss at points of pressure if a dog likes to lay on hard surfaces, but we also worry about things like ringworm (a fungal infection), skin mites, and bacterial infection causing patches of hair loss. I would recommend bringing your dog in to the vet to examine the area. They may recommend a fungal culture if ringworm is suspected or a cytology of the skin to check for bacteria or a skin scrape to check for mites.

Poor Mia! It could be that she injured herself causing this patch of fur missing and the scabs, or she could have been very itchy leading to self trauma. I would keep an eye on it for now since it appears the area is healing. Should the area not heal over the next week or so, you notice her biting or scratching at the area, or if it appears to appears to spread, then I would have Mia seen by a vet.

It's hard to tell, but this could be from an injury or it could be a ringworm lesion. To be safe, I think it's best to take Mia into the vet this weekend to get it diagnosed and treated. I hope this helps!

Hi there. Many things could be causing it. It could have been a good scratch, or it could be early signs of a mite infection called demodex. If it spreads or doesn’t seem to be improving then I would recommend having him examined by your veterinarian. Best of luck and I hope he improves soon.

Hello. All I can see is a small area of dermatitis on the leg. It can have many causes, but you can treat this with an over the counter skin antiseptic called Hibiclens. Gently scrub the skin twice a day & dab dry ( do not rinse ). Do this for about 2-3 weeks & the lesion should clear up. But since I cannot make any kind of actual diagnosis, if the skin becomes more irritated or the area does not seem to be healing, please consider seeing your veterinarian. Thanks for using Petco Pet Education Center, formerly Petcoach.

This appears to be a skin infection that's causing this to be red/inflamed and lose hair. They usually get this when something gets stuck in-between the toes, or a primary infection develops in the skin or under the toenail. It's best to have a veterinarian examine him sometime in the next day or so, because if something is stuck under the skin, then it will need to be removed in order for the wound to heal. Otherwise it can get much worse. For now you try doing to following: 1) Clip the hair around the area and expose all of the sore skin. 2) Wash/spray the area with just cool, clean water (no soap or other antiseptics) for at least 5 minutes at a time. Do this at least twice a day. 3) Bandage the wound with gauze and apply an over-the-counter antibacterial cream (i.e Neosporin) to the wound. Keeping it covered and keeping Sammy from licking it will be the most difficult part of the treatment. You can help keep the bandage on by placing a good (really sticky) tape above and below the bandage. You can find sprays in the pet store, like bitter apple, that are meant to deter licking. This can be sprayed on the bandage (not the wound) to help keep Sammy from chewing it off. NOTE: Be careful not to bandage too tight or it can cut-off the circulation. If you notice that the toes/foot starts to swell, then remove the bandage and leave it off until the swelling goes down. I hope that helps and Sammy gets better soon.