Now that the infection has cleared up, I would plan to spay. Directly from a publicly available vet hospital website: “The rate of recurrence of the disease in a treated cat is generally thought to be as high as 50-75%.”
I honestly wouldn’t risk the queen.
I am assuming all medications were prescribed by a veterinarian and an exam done on all kittens? If so I would check with the prescribing Dr. I have had foster puppies who have been incredibly sick and on many medications at once at the advice of our vet. In the case of my foster pups they were very sick, the risk of not treating outweighed the risk of treating. That is a conversation though that you should have with the vet who examined and prescribed the meds. Best of luck with the kittens and so very sorry for your loss.
Thanks for your answer. Yes, all medication were prescribed by the vet of our shelter. I also planned to ask her this tomorrow when the next visit is scheduled. Just wanted to ask for other peoples experiences for similar situations.
We also had very sick kittens, where the risk of not treating them was bigger than the risk of treating – but they had other problems.