Swollen mammary glands after spay

My cat Zia was spayed in the middle of November and Fleur end of November. Tonight, when I was stroking Zia, I noticed all of her mammary glands are very swollen up like she is full of milk. They are squishy not hard and there is no milk from the nipples. I checked Fleur and hers are swollen too, just not to the same extent as Zia's.

Zia's mammary glands they are very very swollen, but don't seem to be painful (at least she doesnt seem bothered by them) No redness or discharge, she is eating, drinking, still playful, just her normal self.

I will be calling the vet tomorrow as soon as they open. But has anybody seen anything like this before ?
I wouldn't think its normal - but two cats having it at the same time ?

I had never heard of it either.  I know that you are a breeder, were these mature kitties that were spayed.  I don't know if that would make a difference.  My only experience has been with kittens.

Denice said:

I had never heard of it either.  I know that you are a breeder, were these mature kitties that were spayed.  I don't know if that would make a difference.  My only experience has been with kittens.

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It is very strange, :nod:

They are both sisters and will be two years old the end of January. So, not kittens but not that mature either really. Fleur never had kittens but Zia had one litter born in April. :confuse3: