Spaying Feral kittens

I'm fostering 4 Feral kittens and their mom. I am getting the kittens spayed and neutered on Monday. They've been in a kennel for about a week now. They like to lay in their liter box. I clean the liter box and kennel daily, but I'm worried about them getting an infection after surgery. I wondered if it would be safer to take them out of the kennel after surgery so they aren't tempted to nap in their liter box. Should they stay in the same room with their mother after surgery? I am worried she might accidentally hurt them and they might smell different to her. She's a bit crazy. Her surgery isn't for another week. We are waiting for her to dry up.  She's the one I thought was already fixed because of the left clipped ear.  Any advice would be appreciated thanks

You might call your vet, it would be far better if they can all be done at once so they all smell the same. I've had several cats spayed that were still nursing. If not, I would keep the kittens separate for a while, but in sight of the mother if possible. so she doesn't stress or start to forget them. You might try putting a small box in the kennel with a small opening, even if it takes up most of the room, they might want to hide for a while and might use it.  Or try two litter boxes and see if they will use one to sleep on and the other to eliminate. Cats have miraculous healing abilities, I've seen many open wounds that heal fine in the wild, under terrible dirty conditions. Just monitor them for a week if possible and watch for swelling, oozing colored pus, and heat at the site. Some swelling, lumps, and watery blood can be expected. I've NEVER had a cat use a 'collar' either, I think they are too stressful except in extreme situations, they need to lick their wounds at times to calm themselves, I've never had one self mutilate, although that should be watched for, especially in the first 24 hours.  I always stress out so much before having something like this done, their crying tears at my heart. But they have such a better life after it is well worth it,no more fighting, roaming, and having litter after litter of unwanted kittens. Bless you for doing what you are doing, I wish more people could be like you, you are an angel!

Thanks that's some excellent advice. I  know the clinic I am going  to won't spay a cat who is still producing milk. It's been a week and maybe two days since she's nursed them. I will call them and check though. It would be better do get them all fixed at the same time. It's possible she has already been TNR because she has a left clipped ear, which looks surgical,  I started feeding her, then she moved the kittens to my deck. I since then have trapped them all and they are indoors.

My foster liaison weighed the kittens and they are 2.4 lbs eating kibble, soft food, and drinking water and kitten formula. All the kittens had their first bath yesterday and did surprisingly well.  I'm in love with these babies 3 boys and a girl. I'm trying to socialize them so they can actually become lazy house cats in the future. I don't think mom will ever be adoptable, but she can always hang out in my sun room and eat. She was doing great rubbing up against my leg until I kenneled her kittens. Now she is mad at me. lol