Increased Thirst (Polydipsia)- while there may be minor changes in the amount of water your dog drinks on basis of ambient temperature any further changes in water intake maybe indicative of certain diseases such as urinary tract infection, hyperthyroidism, renal issues etc. 

Increased Appetite (Polyphagia)- endocrine diseases like Hyperthyroidism and Cushing’s disease may result in excessive hunger in your dog. These may be accompanied by other symptoms like weight loss, excessive thirst, skin conditions etc.

Decreased Hunger (Anorexia)- Cancers, liver or renal diseases, cardiac disorders and gastrointestinal diseases may result in anorexia. Consult your veterinarian immediately if your dogs hasn’t eaten in 24 h especially if they aren’t picky eaters.

Mobility Issues-you may notice your senior dog having difficulty getting around and doing things that they enjoyed before like play fetch or going for a walk. This maybe indicative of arthritis. Consult your vet for medication and supplements. Lethargy in our dog may also indicate heart failure, Cushing diseases, Addison’s disease, hypothyroidism and cancers.

Vomiting/Diarrhoea- while this might just mean your dog went through the trash but it may also mean gastrointestinal tract infections, endocrine diseases, intestinal parasitism or kidney disease.

Sudden Changes in weight- sudden loss of weight may be indicative of serious systemic diseases. if the weight loss is accompanied by increased by increase in thirst and urination it could be indicative of Diabetes. Weight loss may also occur due to heart diseases, UTI’s, Cancers, renal diseases etc. Weight gain may be a symptom of hypothyroidism. Joint or mobility issues may also result in weight gain

Behaviour/ Memory Problems- Cognitive dysfunction occur in dogs once their mental faculties decline. The symptoms may mimic Alzheimer’s in dogs. Other symptoms to look out for are night terrors, tremors, anxiety and disorientation. If caught early on progression of disease can be slowed with therapy and medication.

Lumps and Bumps- while some bumps or lumps can be benign and nothing to worry about, others may be malignant. It is always important to regularly check your dog for any abnormal growths and then get these checked at a veterinary clinic.

Cloudy eyes- the most common reasons for cloudy eyes in senior dogs is Cataract and Nuclear sclerosis. But it may also be indicative of serious underlying diseases such as Glaucoma, dry eyes (keratoconjunctivitis sicca), ulcers, anterior uveitis or corneal dystrophy. Hence always be mindful of any changes in your dog’s eyes- opacity, redness, discharges etc. take your veterinarians help to treat any ocular conditions in your dog.

Vision/hearing loss

Strained urination- pain or blood during urination maybe be indicative of UTI’s or bladder stones

Bad Breath- excessive bad breath, inflamed gums, difficulty while chewing and excessive salivation is highly indicative of periodontal disease. Since dental issues may lead to serious systemic disorders it is very important to get a check-up.

Other signs you need to watch out for are- hearing or vision loss, urinary incontinence, increased urination, alopecia and wounds that just don’t heal. If you do have a senior dog ensure that you perform regular health checks ups at your veterinarians.