Experienced and professional animal trainer provide their insights in answering this question :
A. Your dog is cryptorchid, so he has one or both retained testicles. The testicle/s may be in the inguinal area or may be still inside the abdomen.

I would strongly suggest to remove them surgically. Retained testicles are more prone to develop tumors.

The type of surgery depends on the location of the testicle/s; in both cases is not a complicated surgery and is done routinely.

How to Identify Common Pet Problems ?

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Neutering – you should usually arrange for your dog to be neutered at around six months old, though your vet will be able to advise you exactly when is best.
The neutering procedure that will be performed is an orchiectomy, the removal of both testicles. This is done through a small incision in front of the scrotum. The incision is typically closed with buried, dissolvable sutures. The scrotal sac is left intact, but it usually disappears within a few months.
Neutered Jack Russells are generally less aggressive and show fewer behavioral problems, they are less likely to escape from your home to go roaming, and they are less likely to develop certain cancers—these are a few great reasons to have your dog neutered as soon as physically possible.
When should I neuter my male dog? Small dogs do not have as many orthopedic issues, therefore it is fine to neuter them on the younger side at 6-12 months of age. For large dogs that are very prone to orthopedic injury/diseases we now recommend waiting to neuter until 9-18 months of age.
An age of six to nine months of age may be appropriate for neutering or spaying a toy breed puppy or small breed puppy but a larger or giant breed may need to wait until they are near or over 12-18 months of age.
Is it Too Late? The recommended time to spay or neuter a dog is six to nine months. But if your dog is healthy, there is no specific age limit to having the procedure done.
In male dogs, it may even appear that they still have testicles in the scrotum, but this is due to the swelling and goes away after a few days. This means that it is not a postoperative complication of castration.
The scrotum is not removed during a neuter surgery. Your veterinarian should instruct you on how to take care of your pet after surgery. It is vital that you restrict your pet`s activity level for 2 weeks after surgery so that your dog doesn`t tear its stitches out.
While male dogs who are neutered do experience an increase in aggressive behaviors right after the procedure, neutering can make them much less aggressive over time. In fact, neutering has bee proven to create a much happier and calmer male dog over time.
The short answer is that no, your dog isn`t likely to be less hyperactive after getting spayed or neutered. It won`t change their personality much, if at all.
Based on this information it is our general recommendation that clients consider delaying neutering of large breed dogs (60 – 100 lbs at maturity) until 11-12 months of age or after their first heat and giant breed dogs (100+ lbs at maturity) to 14 months or after their first heat.
There is new knowledge related to reproductive surgeries that suggest that spaying or neutering pets at that age could potentially lead to an increased risk of conditions such as joint disorders, cranial cruciate injuries, and some cancers.
The traditional age for neutering is six to nine months. However, puppies as young as eight weeks can be neutered as long as there aren`t other health problems. An adult dog can be neutered at any time but there is a larger risk of complications.
Early-age neutering does not stunt growth in dogs or cats (a once-held belief), but may alter metabolic rates in cats. The anaesthetic and surgical procedures are apparently safe for young puppies and kittens; morbidity is lower and recovery is faster than in adult animals.
Benefits of Neutering (males):

Less desire to roam, therefore less likely to be injured in fights or auto accidents. Risk of testicular cancer is eliminated, and decreases incidence of prostate disease. Reduces number of unwanted cats/kittens/dogs/puppies. Decreases aggressive behavior, including dog bites.

Any dog that will be over 45 pounds as an adult should be neutered after their growth stops. This time period is typically between 9 and 15 months of age. For females, the decision to spay is based on additional factors. Some of these factors include your dog`s disease risk as well as your and your dog`s lifestyle.
Signs of pain for longer than a week (shaking, hiding, drooling) Acute redness, swelling, or bruising at the incision site. Bleeding or pus from the incision site. Vomiting or diarrhea longer than 24 hours after the procedure (some immediately after can be normal as a result of anesthesia)
The pain associated with spay or neuter surgeries is typically more of a discomfort and may last for just a few days and should be completely gone after about a week. If your pet is experiencing pain or discomfort for more than a couple of days it`s a good idea to contact your vet for further advice.
Neutering will simply inhibit those instincts by lowering their testosterone. After neutering, your dog will be healthier, easier to train, and more affectionate. You won`t have to chase after your dog as he chases a dog in heat. You won`t have to clean up the pee that your dog used to mark his territory on your futon.
So we must be cautious to take a step back occasionally and consider their lives from the viewpoint of a dog, not from a human. There is little to no evidence that dogs miss their testicles in anyway, emotionally benefit from retaining them and having sex, or lose any `masculinity`.
Do not let your dog lick his incision. Many male dogs tend to lick their scrotum after the surgery. This should be prevented. Licking can irritate the skin, delay healing and lead to a secondary infection.
Keep your pet confined where it will be quiet and warm. DO NOT place it on a bed or other high place. Keep your pet away from other animals and children for at least 12 hours. Offer water and food in very small amounts for the first 12 hours.
Step 3: Our veterinarian removes the testicles

In large dogs, the scrotum may also be removed to prevent a postoperative scrotal hematoma, which can happen when the pet is too active after surgery and the empty scrotum fills with blood. Generally, the scrotum is left in the pet.

Most controlled scientific studies on this question (and there have been many!) show that whether a dog is spayed or neutered has no impact at all on the likelihood that they will be aggressive in any given circumstance.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Q. I took my 10 mo old Jack Russel to the vet for surgery (neuter) he told me he was unable to find his testickles, what should I do.
ANSWER : A. Your dog is cryptorchid, so he has one or both retained testicles. The testicle/s may be in the inguinal area or may be still inside the abdomen.

I would strongly suggest to remove them surgically. Retained testicles are more prone to develop tumors.

The type of surgery depends on the location of the testicle/s; in both cases is not a complicated surgery and is done routinely.

Q. Is neutering a good idea? What are the main aspects to consider?
ANSWER : A. Neutering is a procedure that surgically removes a dog’s testicles for the purpose of canine population control, certain medical health benefits, and behavioral modification.

There are several pros and cons to neutering. The positive aspects of neutering include the following:
1. Reduces the risk of prostate disorders, including prostate infections, prostate cysts, or enlarged prostate tissue. It also reduces the risk of testicular cancer, perineal hernias, and perianal fistulas.
2. Reduces the risk of dominance and aggression in many dogs due to a reduction in the amount of circulating testosterone.
3. Reduces the occurrence of sexual behaviors, such as humping, urine marking, or licking of genital regions.
4. Population control – neutering prevents dogs from creating more litters of puppies that need homes.

The following are possible issues to consider:
1. Neutering is a surgery that requires general anesthesia causing slight risks involved in placing an animal under sedation and anesthesia. Performing bloodwork prior to any anesthetic procedure can help decrease the risk of complications prior to surgery.
2. There is an increased risk of neutered dogs becoming prone to obesity because of a change in hormones and activity level.
3. Neutering your dog at too early of an age can have complications.

Overall, neutering is a good idea for your dog in order to prevent population overgrowth and specific medical issues that can result if your dog remains intact. Consult with your veterinarian on the details of surgery and any risk factors based on your dog’s age and breed.

The AVMA supports the concept of pediatric spay/neuter in dogs and cats in an effort to reduce the number of unwanted animals of these species. Just as for other veterinary medical and surgical procedures, veterinarians should use their best medical judgment in deciding at what age spay/neuter should be performed on individual animals.

Read Full Q/A … : Spay/Neuter Your Pet

Q. We have a 3 yr old Weiner dog, she is having pus in her eyes, I took her to the vet he gave me derma vet ointment, used it as the doctor prescribed
ANSWER : A. If the pus really isn’t all that bad, and it’s just some discharge, your pup may benefit from a diet change. It could be that the food you’re feeding just isn’t right for your dog, and that’s okay! Dogs grow and change over time, and now that your dog is fully matured, a diet change may be in order. Try something like Taste of the Wild, maybe a grain free dog food, Orijen, or Ziwipeak. These are all really great food options.

If the pus is really bad, and continues to get worse, see your vet again and let them know what’s going on. Maybe you could try a diet change, and then see if there are any improvements.

Remember, you should always gradually change a dogs diet. By gradually, I mean you put a tiny bit of new kibble in with a bowl of the old kibble. Reduce the old kibble by just a few bits of kibble. Throughout the course of at least two weeks (or as long as you want depending on whether or not you want to finish off the old food) you slowly add more of the new kibble while removing some of the old kibble. This makes the process gradual, and won’t cause any tummy-upset in your dog.

Q. My cat is excessively scrstching herself., to the point she has sores. She is strictly an indoor cat. Did have flees been treated for 2 months
ANSWER : A. For every flea you see on your pet, there are 100 more in the environment. Get your pet on a good topical or oral flea control through your vet. In flea control, you get what you pay for. Consider asking your vet for a dose of Capstar. It helps get the problem under control by killing the fleas on the pet starting in five minutes but only lasts for 24 hours.

You need to treat your home environment. If you use a pest control service, tell them you are having a flea problem and they can adjust their treatment. Use a premise spray that also contains an IGR, insect growth regulator. This keeps eggs and larvae from maturing into adults and helps break the life cycle. Also, vacuum EVERY DAY, throwing out the bag or emptying the canister every time into an outside receptacle and spraying the contents with insecticide to kill the fleas you’ve vacuumed up.

Treat your yard too, since fleas are opportunistic and will hop a ride into your home on your pant leg without you knowing it. Concentrate on areas under bushes, in the shade. Fleas are less likely to be located in open sunny areas where it gets hot.

If chemicals are a problem, you can use borax. Sprinkle it into rugs, into corners and under furniture, use a broom to work it into the fibers and let it sit for hours, days even. It won’t hurt you or your pet to have it present. Then vacuum it up, reapply as needed. Food grade diatomaceous earth can be gotten from a health food store and worked into the rugs and corners in the same way as borax. These treatments aren’t as fast and effective as chemical insecticides but they can help.

You might want to consider boarding your pet for the day at your vet, to give you the opportunity to flea bomb your house without having to worry about your pet being exposed. They can bathe your pet and give a dose of Capstar while you treat your home.

Be patient, you may have to repeat these steps multiple times 10-14 days apart to help break the flea life cycle.

Skin problems can have a variety of causes, sometimes more than one. It is important to have the problem checked by your vet to determine if there is a medical cause for your pet’s skin issues and treat accordingly.

In pets of all ages, fleas, food allergies and exposure to chemical irritants such as cleaners and soaps can be a cause. Any one of these may not be enough to trigger the breakouts, depending on how sensitive your pet is, but a combination can be enough to start the itch-scratch cycle. Finding out the cause and eliminating it is the best course of action. With flea allergies, if your pet is sensitive enough, a single bite can cause them to break out scratch enough to tear their skin.

Check for fleas with a flea comb. Look for fleas and/or tiny black granules, like coarse black pepper. This is flea feces, consisting of digested, dried blood. You may find tiny white particles, like salt, which are the flea eggs. Applying a good topical monthly flea treatment and aggressively treating your house and yard will help break the flea life cycle.

If you use plastic bowls, this is a possible cause for hair loss, though this tends to be on the chin, where their skin touches the bowl while they eat. If you suspect this to be the culprit, try changing the bowls to glass, metal or ceramic.

Food allergies are often caused by sensitivity to a protein in the food. Hill’s Science Diet offers some non-prescription options for sensitive skin as well as prescription hypoallergenic foods for more severe cases. Royal Canin carries limited protein diets that may also offer some relief. Your vet can recommend a specific diet that will help.

If there is no relief or not enough, consider getting your pet checked by a veterinary dermatologist and having allergy testing done.

Q. My Lab has a torn cruciate. He is around 10 years old, he seems to become tired because of the pain. He is stilling eating and drinking.
ANSWER : A. If you haven’t seen your vet then you need an appointment to get appropriate pain relief. If you have been to the vet and the pain meds you have already been given aren’t working you need to go back for something stronger. Your vet will be able to advise if surgery or strict rest is the best option for your dog. Usually larger breed dogs require surgery.

Q. My dog cracked his nail horizontally, I put neosporine on it with gauze and a sock for no snagging. What should I do and what would a vet cost?
ANSWER : A. It depends on how deep it’s cut and if it’s going to snag on something and rip the entire nail off. It would probably be best to go to the vet now rather than later when a more serious injury occurs. The cost really depends on where you live and what the vet decides to do. I really can’t give much of an estimate other than the initial cost of a sick exam (which also varies from vet to vet). Call the vet and when you make the appointment ask how much a sick exam costs, that will be your initial payment (Amount just to see the vet).

Q. I have a 13 yr old Cocker Spaniel who tore a ligament in back leg. She is blind in one eye and deaf. Should she go through surgery?
ANSWER : A. You need to be guided by your vet. The age needs to be taken into account and I would want liver and kidney blood tests done prior to surgery to ensure they are functioning properly. Also I would expect her to be on iv fluids during the surgery. Recovery can be longer in older dogs too after a general anaesthetic. You should discuss in detail the quality of life and general health of the dog as to wether it is worth putting her through surgery. She is probably too big to be left without surgery so there are really only the two options.

Q. My a dod, a 10yrs old Maltese x shit-tsu, limps her right front leg. Being to vet, but physical found nothing. Now, muscles loss e shoulders bonny. Ts
ANSWER : A. Unfortunately many dogs are very stoic at the vet and don’t show pain (and thus, the location of the problem) during an exam. I think you’ll need to try again, either with your same vet or another vet, to diagnose the location of the problem. At 10 years of age she could have osteoarthritis in any of her forelimb joints, or could even have a systemic problem such as Lyme disease that’s causing joint pain. Clearly if you’re noticing atrophy in the shoulder muscles there’s a problem, so I’d urge you to find someone who can really help you diagnose this and treat it properly.

Read Full Q/A … : R