
Never knew with both pregnancies. Mothers really bug me, I told her the dog was due to go in season and had to be taken over to Grans, as always she never did it in time. I was away at Uni. Got the pups for my 21st birthday present :)
Anyway back to the point, both pregnancies the dog remained the same stubborn, spoiled, lazy, soppy dog - she's a real Diva. Didn't change weight, was always cobby and stocky, vet said "hmmm she'll need to lose some weight", she turned her nose up at the diet food then a few weeks later out pops puppy in the middle of the living room floor. During both pregnancies she had been to the vet for various little things, never noticed she was pregnant, at one time she and the dog were on contraceptives (show dogs), still got pregnant. It was a case of the woman who didn't know she was pregnant until she went to the toilet for a number 2 and came out with a baby.
Bizarrely, she had a phantom pregnancy and we cought that straight away. Her temperament changed completely. I guess it just depends on the dog.