The most common diseases in dogs: the main symptoms to recognize them

Dogs are our faithful four-legged companions, but unfortunately, like humans, they too can fall ill and risk serious consequences.

The most common diseases in dogs can be difficult to recognise, but it is important to be able to detect them early so that we can intervene in good time and guarantee our beloved four-legged friends a long and healthy life. 

This photo gallery gives an overview of some of the main symptoms of the most common diseases in dogs, explaining how to recognise them so that you understand whether you need to take your pet to the vet urgently. (source:

Difficult to diagnose, gastritis is a frequent disease in dogs: it is an inflammation of the gastric mucosa caused by poor nutrition. This disease can manifest itself with vomiting, abdominal bloating, loss of appetite or weight, lack of energy and excessive saliva production.
Otitis is an ear infection, especially common in breeds with long, droopy ears, such as the cocker spaniel, and can be caused by contact with water or exposure to very humid environments. The symptoms of otitis are a bad smell coming from the ears and the secretion of a yellowish fluid. In addition, in this situation, the dog usually tends to scratch its ears and shake its head to the side.
Although a vaccine exists, this disease is very contagious and can become fatal in unvaccinated puppies or animals. This disease can present very varied symptoms, such as discharge, fever, cough, sneezing, diarrhea (and many others), which is why it is very complicated to identify.
Osteoarthritis is a disease due to inflammation and degeneration of joints, mainly of the hip and elbow; it is common in older dogs and in some breeds in particular, such as the German shepherd or doberman. The main symptoms include lameness, pain, stiffness and swelling of the joints or hind or front legs, tremors, and refusal to move.
Intestinal worms
Among the 'intestinal worms' that can affect dogs, the most common is the tapeworm, the contagion of which occurs through infected dog faeces or the ingestion of raw or undercooked food. The main symptoms include diarrhoea, loss of body weight, anaemia, bloating and/or abdominal pain, presence of blood in the faeces, vomiting and fever.
Scabies is a skin disease caused by mites, which infect the dermis. The main symptoms associated with this disease include hairless areas, intense itching, scabs, inappetence, skin redness, erythema, swollen lymph nodes and fever.
Parvovirus is a disease that mainly affects the digestive system but can also prevent the heart and intestine from functioning properly. Symptoms of canine parvovirus include vomiting, lack of appetite, blood in the faeces, fatigue, diarrhoea, depression, lack of energy and dehydration.
Leishmaniasis is an infectious disease of parasitic origin caused by protozoa of the genus Leishmania: it is transmitted by insects (mosquitoes). The main symptoms with which this disease can manifest itself include slimming, polyphagia, increased explorable lymph nodes, disproportionate elongation of the nails, skin ulcers that do not heal, furfuraceous dermatitis, nasal haemorrhages and keratitis.
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