Will my senior dog with mammary tumors produce milk if pregnant?

Mammary cancer is not normally considered to be a hereditary problem, so to the best of my knowledge this should not be a concern for the puppies. However, in most cases, it is recommended to spay female dogs with a history of mammary cancer because this is a hormonally-driven disease; so, remaining intact and breeding may not be recommended for the mother dog herself. I would recommend discussing this further with your regular veterinarian, since he/she is familiar with the details of your dog's case (what type of cancer she had, how aggressive it was, whether the tumor was completely removed, etc.) and can help you make a more informed decision.

To be completely honest, having her spayed at this point of her life will not prevent future tumors but it can prevent pyometra (uterine infection), the tumors do need to be removed surgically though as they tend to grow and ulcerate at some point and the dog can no longer live this way, having them removed often solves the problem.

She may be having a false pregnancy. If she had contact with a male while she was in heat, she could be pregnant. She could also have a hormonal problem or a mammary tumor. It would be best to take her to a veterinarian for an exam. The vet can also tell you whether she is pregnant. Unfortunately this is impossible without a hands-on exam.

What you are feeling are tumors (breast cancer); very common in dogs that are not spayed. They could be benign or malignant. I can't tell you that. You need to have them surgically removed and sent to a lab for histopathology. She should also be spayed as the same time as the masses are removed. ( https://www.petcoach.co/article/mammary-cancer-in-dogs/ )

As she is unspayed it's very likely a primary tumor of the mammary gland, it's not possible to know if it has already sent metastases to other places in the body though. the recommendation is to get it removed surgically ASAP.

Yes, it is most likely mammary (breast) cancer. Very common to happen in dogs that are not spayed. That is why we recommended spaying dogs early in life. 1. I suggest you find a vet that will do both surgeries at once. There is no sense in doing two surgeries a month apart. They can both be done safely at the same time in most cases. She may be one of those cases that the mass is extensive and that is why your vet does not want to do them at the same time. I don't know since I have not examined her myself but in most cases I would do both surgeries together. Just my opinion. 2. You need to get her spayed, even at 8 years old. If you don't, then she may end up with more mammary tumors or a pyometra or she may pass away. Yes, a blood test before the spay is indicated absolutely. 3. It should not change her much. If you don't do it then she can certainly die just like a person with breast cancer so you really have no option but to have it done. Hope this helps. Best wishes.

It sounds like Beauty may be dealing with a pregnancy, false pregnancy, or a mammary infection, as it is unlikely she would still be producing milk after this long otherwise. Please visit the following link for more information: https://veterinarypartner.vin.com/default.aspx?pid=19239&id=4952188 I also recommend talking to your vet about having Beauty spayed. Spaying stops the heat cycle, eliminates the risk and cost of unwanted breeding, and early spaying can reduce the risk of uterine and ovarian cancer, as well as reduce the risk of potentially fatal uterine infections and mammary cancer. If this is a false pregnancy, your vet will discuss the right time to have Beauty spayed to help prevent it from continuing/ happening again.