What are the signs of canine cancer?

Dog cancer symptoms vary depending on the type of cancer. Cancerous tumors present as a growth on the body that may bleed, ooze, or smell. Other types of dog cancers may cause:

- Swelling
- Fatigue
- Depression
- Breathing difficulty
- Poor mobility
- Vomiting
- Diarrhea
- Constipation
- Mood shifts
- Decreased appetite

These symptoms can be gradual or sudden changes. Our pets are very good at masking symptoms. In some cases, you may not be able to tell until the cancer has progressed. Always contact your veterinarian if you suspect something is off with your pup.

Expert Verified

Dorothy Jackson Girimonte
DVM, DACVIM, CVA

Board-Certified Veterinarian
@fidocure

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Antonio Giuliano
DVM, ECVIM Giuliano, DVM, ECVIM

Topic Expert

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askPurrch information is provided for educational purposes only. Please consult your veterinarian before making decisions for your pet(s).

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Pet Poison Control Hotline

A consultation fee may apply

ASPCA Animal Poison Control: (888) 426-4435

Pet Poison Hotline: (800) 213-6680

Important side note

on pet toxicities

During COVID, as people introduced new substances into their homes, such as baker’s yeast, paint, and vitamin D3, pet poisonings notably increased. Keep your pet safe by avoiding these highly toxic household products.

Over-the-counter drugs of all sorts (painkillers, cold medications, dietary supplements, etc.)
Insecticides
Household plants
Household cleaners (including hand sanitizer)
Heavy metal including lead, zinc and mercury
Fertilizers and other garden-related products
Automotive chemicals including antifreeze which is one of the most highly poisonous substances

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Pet Poison Control Hotline

A consultation fee may apply

ASPCA Animal Poison Control: (888) 426-4435

Pet Poison Hotline: (800) 213-6680

Important side note

on pet toxicities

During COVID, as people introduced new substances into their homes, such as baker’s yeast, paint, and vitamin D3, pet poisonings notably increased. Keep your pet safe by avoiding these highly toxic household products.

Over-the-counter drugs of all sorts (painkillers, cold medications, dietary supplements, etc.)
Insecticides
Household plants
Household cleaners (including hand sanitizer)
Heavy metal including lead, zinc and mercury
Fertilizers and other garden-related products
Automotive chemicals including antifreeze which is one of the most highly poisonous substances