Experienced and professional animal trainer provide their insights in answering this question :
A. If it is healing well then any tissue damage that may have been there would be healing too and have formed scared tissue. You may be able to see it with ultrasound but it isn’t necessary if it’s healing.

How to Identify Common Pet Problems ?

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Watch for signs of infection.

See a doctor if the wound isn`t healing or you notice any increasing pain, pus, swelling or fever. On light skin, spreading redness is a sign of infection. On dark skin, redness may not be apparent, or the infection`s streaks may look purplish-gray or darker than your normal skin.

A puncture wound is a hole in the skin made by a sharp, pointed object. The area may be bruised or swollen. You may have bleeding, pain, or trouble moving the affected area.
Puncture wounds are also prone to infection and should be treated appropriately. Stitches are primarily used if the cut is more that a quarter inch deep, is on the face, or reaches bone. Stitches help hold the wound together so it can heal properly.
How Long Does it Take for a Puncture Wound to Heal in a Dog? It usually takes about three to four days for a wound to heal if proper cleaning and treatment have been administered.
Puncture wounds can take a few days to a couple of weeks to heal. It depends on the depth and severity of the damage, as well as your overall health. If you have diabetes or another condition affecting blood flow, the wound may take longer to heal.
Signs it`s working: During this stage of healing, you may experience swelling, redness or pain while your wound heals. Your skin may also feel hot to the touch, and you may see a clear liquid around your wound. These are all signs that the inflammatory stage of wound healing is well underway.
Although not an all-inclusive list, some of the more common complications include infection, tissue necrosis and gangrene, periwound dermatitis, periwound edema, osteomyelitis, hematomas, and dehiscence.
You have tingling, weakness, or numbness near the wound. You have trouble moving the area near the wound. You have symptoms of infection, such as: Increased pain, swelling, warmth, or redness around the wound.
Whether it`s a surgical wound or one that seemed minor at first but is getting worse instead of better, any wound that`s infected should be evaluated by a medical provider. Signs a wound may be infected include: Increasing pain or redness. Drainage or bleeding that won`t stop.
Here are some signs that the wound is healing well: Scab formation after the wound bleeds. Swelling, redness, pain, warm skin, and an initial discharge of clear liquid for up to 5 days (these things promote healing and are the body`s way to prevent infection) New tissue growth as the wound heals.
In adults, optimal wound healing should involve four continuous and overlapping phases: Haemostasis, inflammation, proliferation, and remodelling .
Injured tissues release chemicals. In response, the body increases circulation to the injured area, bringing white blood cells and nutrients. The injured area and tissues surrounding it become swollen, warm and reddened. The inflammatory response limits function (because it causes more pain) to help the tissues heal.
New soft moist pink tissue should be forming in the area the wound was sustained in. If there is no new soft pink flesh forming where the wound was sustained, and you notice flesh around the wound is looking dark or feeling leathery, this is a bad sign.
In most cases, your dog will heal just fine without any medical intervention. However, if the wound does not seem to be healing properly, you should take your dog to the vet. One of the ways to check fast and quickly if you have to go see the vet urgently is to use vet chat online.
Massage in the early stages of healing is not indicated, as it may delay healing and increase the risk of hypertrophy. Any type of wound can be treated with massage, although the most studied have been burns and post-surgical wounds.
Complete scar removal is not possible, but most scars will gradually fade over time. A number of treatments are available that may improve a scar`s appearance and help make it less visible. If scarring is unsightly, uncomfortable or restrictive, treatment options may include: topical silicone gel or silicone gel sheets.
Capillaries are formed to service the new skin tissue. Contraction occurs at the edges of the wound to reduce the size of the wound. Surface skin cells migrate from one side of the wound to the other, covering the wound with cells to form the new skin. Depending on the injury, the site is left with a scar.
Even after your wound looks closed and repaired, it`s still healing. It might look pink and stretched or puckered. You may feel itching or tightness over the area. Your body continues to repair and strengthen the area.
The most common soft tissues injured are muscles, tendons, and ligaments. These injuries often occur during sports and exercise activities, but sometimes simple everyday activities can cause an injury. Sprains, strains, and contusions, as well as tendinitis and bursitis, are common soft-tissue injuries.
Delayed wound healing can have severe and sometimes life-threatening consequences, including deep-seated infection, prolonged hospitalisation, repeat surgery to join or rejoin the wound edges, and delayed functional recovery of a transplanted organ.
A skin wound that doesn`t heal, heals slowly or heals but tends to recur is known as a chronic wound. Some of the many causes of chronic (ongoing) skin wounds can include trauma, burns, skin cancers, infection or underlying medical conditions such as diabetes. Wounds that take a long time to heal need special care.
Complications of Puncture Wounds

The pain will not go away until it is removed. Wound Infection. This happens in 4% of foot punctures. The main symptom is spreading redness 2 or 3 days after the injury.

An infected wound can happen when germs or bacteria find a way into the sensitive tissues beneath our skin via the wound. Infection can develop any time between two to three days after the cut occured, until it`s visibly healed.
Red blood cells help create collagen, which are tough, white fibers that form the foundation for new tissue. The wound starts to fill in with new tissue, called granulation tissue. New skin begins to form over this tissue. As the wound heals, the edges pull inward and the wound gets smaller.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. How can you tell if there is tissue damage behind a puncture wound? Didn’t show on xray.Wound is healing no drainage or additional swelling.
ANSWER : A. If it is healing well then any tissue damage that may have been there would be healing too and have formed scared tissue. You may be able to see it with ultrasound but it isn’t necessary if it’s healing.

Read Full Q/A … : Wound Care CEU Online Course

Q. Dewey has open gash on rear hind leg; not bleeding, but very raw. What can I use to help heal wound?
ANSWER : A. Even if the wound is not actively bleeding, if it is very large (more than an inch or two) or you can visibly see tissue or bone underneath it, it is best to seek veterinary care. Your vet will likely recommend suturing up the wound to prevent infection and other debris from getting inside and taking hold. In larger wounds, antibiotics may also be given preemptively, or a temporary drain placed to keep bacteria from sitting under the skin.

If the wound is small and minor, keeping it clean and dry is the best for preventing infection. A clean warm wet washcloth can be used to clean out any dirt or debris, and then lightly dried with a dry washcloth. Do not attempt to place any over the counter medications unless instructed by your vet as many can be toxic. Keeping your dog from licking or chewing at the wound will also help prevent an infection. Signs of infection to look out for include discoloration, pain, swelling, redness or discharge that is green or yellowish in color. If you see these signs, making an appointment with your vet is best.

Q. Back paw is swollen and he is limping on 3 legs. It looks like it might be infected, what can I do
ANSWER : A. Swelling and limping are signs of an injury to the limb, and signs of infection in addition include swelling that is hot or painful to the touch, or may be oozing greenish or yellow dirty debris. If your dog is actively limping and has signs of infection, he will need to be treated by a veterinarian ASAP. The infection will usually have to be drained and need antibiotics to have it resolved. If there is additional injury to the limb such as a break or sprain, additional tests such as an X-ray may also be needed.

It is best to seek veterinary care ASAP. In the mean time, keep your dog on strict bed rest, do not allow him to lick at the wound, and keep the wound clean of any debris or oozing by using a warm, clean and wet washcloth to remove it.

Q. My cat has a self inflicted neck wound. How can I get her to not scratch and keep opening the wound? She has had an antibiotic shot for this already.
ANSWER : A. If she inflicted the wound because of excessive scratching then your vet should be able to give her medications to stop skin itchiness (for example, steroids). Other options would include a head collar (providing that it will not be touching the wound), clipping claws in back legs or bandaging up the leg she is scratching with. It is also possible to put (or stitch up) a thick dressing on the wound.

Read Full Q/A … : Cat Scratching Its Neck

Q. My 5 month old puppy has what feels like a fluid filled pocket on his shoulder , no visible bites or marks,
ANSWER : A. It is possible that an injury has caused swelling on the shoulder, or you are seeing blistering or even an abscess under the skin. Abscesses, or infections under the skin, may cause pain or feel warm when touched, or may ooze yellow or green debris. Swelling may also be warm or painful, or may cause discoloration or pain while walking. It is best to have the area examined by your local vet who will likely want to take a sample of the swelling to help determine the cause. Treatment depends on the underlying cause and may include drainage of the swelling, kennel rest, or medications to treat infection or pain.

Q. My dog was fine yesterday and now she is limping. She had a grooming last Friday and was fine. I checked for tenderness and it appears to be the paw
ANSWER : A. Pain or injury to the foot can definitely cause a visible limp to appear on a dog. There are many causes such as sprains or strains in the joints including the ankle and toes (caused from falling, jumping or even just stepping wrong), breaks in the bones of the toe or ankle, or even infections such as bacterial infections, fungal infections (very common between the toes) and abscesses (an infection that forms under the skin and swells).

Common signs of this sort of foot problem include tenderness to the touch, redness, swelling, or heat with infection and dislocation with breaks. Bringing your dog into the vet is best if the symptoms do not subside after a day. An X-ray can be taken to look for breaks, and abscesses can be drained and then treated with antibiotics to allow healing. In minor cases such as breaks and sprains, your dog may just need a few days of bed/kennel rest with decreased activity, while in more serious injuries, the toes may need to be taped or casted together to allow healing. Your vet can also provide your dog with pain medication as needed to help her feel better as she heals.

Read Full Q/A … : Causes of Limping in Dogs

Q. My dog arm was ran over by a tire , he was checked no broken bones but he has wound, how do I clean it at home
ANSWER : A. Wound management depends very much on the depth nad size of the wound, location and nearby structures and other complicating factors such as age of dog and infections etc. Your vet should have provided advice on this, a quick call to the office should confirm the best options. Sterile saline and dilute surgical disinfectant such as chlorhexidine can be used to clean surface wounds and shallow grazes may benefit from topical ointments but deep wounds or those near joints should be fully assessed and stitched up as required

Q. My cat has a bite going strait through his ear and many other cuts on his ears and head.is it a good idea to boil water pour salt in and let it cool
ANSWER : A. It is best to just clean the wound with a warm wet washcloth and clean gauze rather than placing anything in or on the ear. Do not use any over the counter medications or salves on the ear as they can be toxic to pets unless directly instructed by your veterinarian. Boiling water will scald your cat and cause further injury so DO NOT place it on the wound. As many cat bites and wounds get infected easily, it is best to contact your veterinarian as soon as possible so that they can disinfect the wound and provide antibiotics as needed to prevent an infection from taking hold while it heals.