One of your other "followers" I'm certain will answer the question as I've never dealt with issue before. I can only tell by various entries you've made, you are doing the very BEST you can caring for Salem and new babies !
As challenging as it may be to commit to both Salem's and Squirt's kitten's I admire your heart. I get it how that Squirt appears to be strictly comfortable among both Salem and Tigger and your not willing to separate them from one another nor interfere with those bonds. I encourage you to a.s.a.p. set up that Go Fund Me account and let followers here know under what user name you do that ! I have already mentioned to hubby I would contribute. Certain a number of followers would be willing to pitch in on behalf of those little ones and their mom's.