Hello,

We have a Lab that is due to whelp aound Sept. 19th-21st. Her mammary gland (right side very back) is so large, it looks as though it is engorged. It is not hot to the touch and her rectal temp is 100.4. The area around the nipple is pink, but all of them are pink s well. It is firm and full to the touch. Does anyone have any ideas?

Thank you!

Sounds like she could have mastitis, it can occur during pregnancy, or while nursing, it's a bacterial infection and should be seen by a vet right away, it's very dangerous to leave this unattended!
Symptoms:
The most obvious symptom is a swollen mammary gland (breast, tit, etc) that is either more red, discolored, painful, firm, or lumpy than the other breasts on the pet.

The breast may discharge pus... or milk that looks different from the other breasts.

Other symptoms might include:
- Fever (rectal temperatures greater than 103 F in both dogs and cats)

- No or poor appetite