Why does my dog react to petting his back and still have fleas?

High quality flea preventatives are very effective, so I would be surprised if your dog is itching from fleas. Different flea preventatives utilize different mechanisms of action to kill fleas. Some preventatives work by killing the flea after it bites, so it is not unheard of to see one rare flea. The important part is that the flea is killed before it has a chance to reproduce and lay eggs. The next time you see dirt on your dog, try to put it onto a white paper towel and moisten it slightly. Flea dirt becomes a reddish-brown color when wet. If you do not notice a significant color change, it is just regular dirt. The dandruff may be appearing as a result of skin sloughing when your dog itches. Allergies to a wide variety of environmental influences and food are a common cause of itching in dogs. Consider discussing this intense itching with your vet because dogs can develop skin infections by introducing bacteria or yeast from excessive scratching.

If you’re noticing increased itching in that area and you found a flea, you may try switching the flea prevention to see if that helps. Fleas can become immune to products. The top products on the market are oral products such as Nexgard and Simparica. Most pets can use these products but you should talk with your veterinarian before switching. They are administered once a month and at this point appear to work very well. If the itching goes away, then you know it was related to flea bites. Best of luck.

I recommend you get him checked by your vet - it is likely the damaged skin has become infected and very painful, hence the biting and snapping towards the area. It is likely he will need antibacterial and antifungal washes and possibly antiinflammatory medication to allow the skin to heal. An omega fatty acid supplement and rigorous flea prevention (including household flea spray to kill the eggs and larvae) are also recommended

Hello there! These could be flea bites for sure, although less likely if he is on a preventative, especially if it is the type of preventative that kills adult fleas, as well as stopping fleas from reproducing. This could be many other types of rash, as well, though, such as a bacterial rash, or even a form a bruising which occurs when the blood platelets are low. It is always a good idea to get a check up done with your vet, to be sure that there is nothing to worry about! Best of luck!

It might be a flea that jumped on him after the application, this can happen but if you find more than one and they are alive then the product you are using is likely not working and you need to change it to something else such as Bravecto, Advantage or Revolution.

Thanks for using Petco Pet Education Center, formerly Petcoach! This is likely due to allergies and until these are improved, he will continue to itch. It really comes down to figuring out what is causing his allergies so that they can be treated or the specific allergen avoided. There are many things that can cause allergies though in most cases they can be broken down into 3 big categories: flea, food and environmental allergies. Allergies are usually worked up in a stepwise fashion starting with flea allergies as this is the easiest and cheapest to take care of. If not on a flea preventative, then it would be a good idea to get started on one. If already on one then it would be a good idea to change to something else (there are many new products out in the market). If not improved in 1-3 months then it is time to move on and check for food allergies by switching to a novel diet (new protein and new carbohydrate). If that does not seem to be the issue then you are left out having to check for environmental allergies which require blood and/or skin tests. Allergies can be very frustrating to deal with at first but so rewarding at the end when we are able to treat them effectively!

Yes, Gidget could absolutely be allergic to her flea treatment! Topical products can definitely cause redness, irritation, hair loss or sores at the application site. They can also cause system reactions such as seizures, tremors and trouble walking but these are rare. Oral products can cause vomiting, diarrhea and decreased appetite. Dogs that have epilepsy may be more prone to have increased seizure frequency but this is also not likely. Extremely rare cases can be anaphylactic reactions of collapse and hypotension and this could be to any product. If you are seeing problems, I would recommend to switch products. While some products have the same active ingredient (like Fipronil), many are different. I have had good flea prevention and very low reactions to Comfortis, Simparica and Revolution. Remember that itching all over can be related to fleas not dying from your product, food allergy or environmental allergies. I hope I answered your question!