TOO LATE to make yourself anonymous. you are Almostover9000 and almost every cat question you have asked I am posting links to.
You are what the Pet section likes to call a back yard breeder.
Ten months ago:
https://answers.yahoo.com/question/index?qid=20150723183746AAPg2dy
https://answers.yahoo.com/question/index?qid=20150729205534AA0NZNf
One month ago:
https://answers.yahoo.com/question/index?qid=20160505103838AArDRQv
https://answers.yahoo.com/question/index?qid=20160506085224AAHQGXw
4 weeks ago:
https://answers.yahoo.com/question/index?qid=20160509004028AAl44Wh
2 weeks ago
https://answers.yahoo.com/question/index?qid=20160523044230AA7HOgm
These questions were opened into a new tab before you decided to hide behind the blue face anonymity feature because, "You can't handle the truth."
A responsible pet owner would have gotten their cat spayed before the first litter.
The fact that you have said that you have to hold the "queen" (mother cat) down just so the kitten can nurse, is a clear indicator that she knows there is something wrong with the kitten. Four weeks old and he has to drag himself across the floor is NOT okay.
You should have taken the kittens to the veterinarian weeks ago. That is the best only option for the kitten.
No one likes putting down animals but sometimes it is the most humane thing to do for them instead of making them suffer.
And to be honest if you had been a responsible and taken them to the vet weeks ago, the vet could have saved the kittens including this one, but you Almostover9000 did not take them to the vet. So it is your fault.
Almostover9000 you have options:
1.) Workout a payment plan with the vet. Talk to the vet and explain your situation calmly and ask nicely about working out a payment plan. You could end up paying at the most half of the vet bill now and the rest at the next vet check up. Or doing a payment plan where you pay a specified amount each month until the bill is paid off.
OR
2.) Take your pets to the local shelter vet and get a vet check up there and they are a lot cheaper than the regular vet.
But did Almostover9000 ever try to take their pets to the vet? Nope, they just ask complete strangers over the internet and when people tell you that you need to take your pets to the vet you just get argumentative and call people names.
You know what Almostover9000 when you commented under Ellen's answer and said and I quote:
"Are you autistic or something?"
End quote. That is RUDE and INSULTING, to people who have Autism. You are being reported for that comment.
Borderline troll question with the lame excuses, nasty insults and now making all your questions anonymous. Yep that is exactly what an internet troll does.
Be responsible and take your cats to the vet or surrender them to a humane society or someone who will take them to the vet.
And that is why the pet section refers to you as a backyard breeder.