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What is a mastectomy, the removal of the mammary chain?

Pies rasy Beagle.

What is a mastectomy?

A mastectomy is a surgical procedure to remove the mammary chain, that is, the animal’s mammary glands. It is performed when a tumour develops in the mammary gland. Unfortunately, this type of tumour is thought to be the most common of all growths in bitches, and it is, sadly, most often malignant.

These tumours can occur in dogs and cats as well as in small mammals such as rats. 

What can cause a mammary tumour?

Tumours can have various causes, and hormonal factors are often involved. Additional causes include:

  • the female’s older age
  • not having been spayed
  • the use of hormonal contraception
  • hormonal activity (heat, oestrus, pregnancy) 

Some breeds are even said to be predisposed to mammary tumours, namely: the German Shepherd, Poodle, Dachshund, Spaniel and Maltese.

Bear in mind that pregnancy does not protect against tumours; on the contrary, it can contribute to their development. 

How can you spot a mammary tumour in your pet?

Growths can vary in size; sometimes they are small and the owner does not notice them straight away, which is why regularly looking your pet over and feeling for lumps works best. 

Animals may show symptoms such as:

  • apathy
  • weight loss
  • drinking less and reluctance to eat

How can mammary tumours be prevented?

The most effective way to prevent this condition is to spay the bitch early. The procedure can reduce the risk of a tumour by as much as 50%, which is why spaying and neutering now count as preventive care. 

It is far better to have a routine procedure done on a bitch than to face the stress of a much more serious mastectomy later on. 

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